Nuclear War

Part I: The Buildup (Or, How We Got Here)

Overview

A secret plan would have killed a fifth of the world's people. It was shown to the men with the power to stop it. None of them spoke. One witness stayed silent for decades. What does it take to speak in time?

The underground briefing

December 1960, Strategic Air Command headquarters, Offutt Air Force Base, Nebraska. American military officials gathered to review a secret plan. According to the book, carrying it out would kill 600 million people. Secretary of Defense Thomas S. Gates Jr. was there, along with the Joint Chiefs of Staff, SAC commander General Thomas S. Power, and the service chiefs. They met in an underground room lined with maps.

Everything known about that day comes from John H. Rubel, a business executive turned defense official. In 2008, in his late eighties and a few years before his death, he revealed the meeting in a short memoir. He admitted remorse for taking part in a plan he called a "heart of darkness" and for decades of silence. What he had been part of, he wrote, was "mass extermination."

At a signal from General Power, a briefer stepped onstage. Two airmen carried tall stepladders to either end of the 150-foot map wall, showing the Soviet Union and China. Each man climbed at the same brisk rate and untied a red ribbon holding a roll of clear plastic. It unrolled with a whoosh, revealing hundreds of small black marks beneath, most of them over Moscow. Each one was a nuclear explosion.

The first wave would come from U.S. fighter jets launching from aircraft carriers near Okinawa, Japan. Then came wave after wave of B-52 bombing runs, each bomber carrying multiple thermonuclear weapons. With each new wave, the men on the ladders untied another pair of ribbons and another sheet came down, burying Moscow under more and more layers.

For Moscow alone, the plan called for forty megatons. That is about 4,000 times the Hiroshima bomb. It is perhaps 20 to 30 times more than all the non-nuclear bombs the Allies dropped in both theaters over more than four years of World War II. Rubel said nothing for 48 years. His admission was the first known instance of an attendee revealing such detail. It conveys what anyone outside that room could see: the plan was genocide.

The girl in the rubble

On August 6, 1945, the bomb dropped on Hiroshima killed more than 80,000 people in a single strike. That number is still debated, since the city's government, hospitals, police, and fire services were destroyed. Code-named Little Boy, it detonated at 1,900 feet, an airburst, above thirteen-year-old Setsuko Thurlow, 1.1 miles from ground zero. It was the first nuclear weapon used in battle. Its burst height came from a figure calculated by the defense scientist John von Neumann, whose assignment was killing as many people on the ground as possible.

Setsuko was knocked unconscious. Coming to, she could not see or move. She heard girls whispering around her: "God, help me, mother help me. I'm here." Sheltered by a collapsed building, she had survived. A man's voice told her not to give up and said he was trying to free her. Then he shook her left shoulder and pushed from behind. She pushed and kicked and crawled out through a doorway. By then the building was on fire, and about 30 other girls in the same place were burning to death. Outside, early morning looked like night. The black shapes shuffling toward her, at first taken for ghosts, had parts of their bodies missing, skin and flesh hanging from bones.

Survivor testimony like hers was suppressed for decades by the U.S. Army and its occupation forces. Defense officials wanted the data on what atomic weapons did to people and buildings for themselves, for another nuclear war. Hiroshima and then Nagasaki three days later ended a war in which 50 to 75 million people had already died. A small group of nuclear scientists and defense officials began planning to use scores of atomic weapons in the next world war, one expected to kill at minimum 600 million people.

The buildup

The plan shown in Nebraska had been a year or so in the making. It was ordered for the president by the secretary of defense. After the war, Los Alamos nearly went dark and half its staff left. Then the Navy, worried about becoming obsolete in the atomic age, revived the program with a public demonstration of atomic blasts against a fleet at Bikini Atoll in 1946. A Joint Chiefs review, classified until 1975, called atomic bombs "weapons of mass destruction" able to "depopulate vast areas." It also said that used in numbers, they could demolish a nation's social and economic structures. It urged stockpiling.

By 1952 the stockpile reached 841 bombs, up from 170 in 1949. That was the year the Soviets tested a near-copy of the Nagasaki weapon, its blueprints stolen from Los Alamos by the spy Klaus Fuchs. Then came the thermonuclear bomb, conceived by Edward Teller and drawn by Richard Garwin. It was a two-stage weapon using an atomic bomb as its trigger and hydrogen fusion for its power. Nobel laureates called it "the most destructive, inhumane, and indiscriminate weapon ever created." Enrico Fermi and I. I. Rabi wrote to President Truman calling it an evil thing. Truman ignored them. The prototype, code-named Mike, weighed about 80 tons and was tested on Elugelab island in the Marshall Islands on November 1, 1952. Its yield was 10.4 megatons, close to 1,000 Hiroshima bombs at once. It left a crater two miles across where the island had been.

Production then industrialized: 1,169 bombs in 1953, 1,703 in 1954, 2,422 in 1955, and 3,692 in 1956, an average of 3.5 new weapons a day. The stockpile reached 18,638 by 1960, when the planners met in Nebraska. It peaked in 1967 at 31,255.

History Lesson No. 1: Deterrence

War planners began creating rules of nuclear war in the 1950s. The idea was to keep nuclear war from happening while still allowing them to work out how to fight and win one.

• Rule No. 1, deterrence: sold to the public as the idea that a massive nuclear stockpile is imperative for discouraging nuclear attack. Each nuclear-armed nation builds an arsenal pointed at its nuclear-armed enemy, ready to launch within minutes.

What Deterrence Costs

Every nuclear-armed nation promises never to use its weapons unless forced to. Each keeps an arsenal aimed at a nuclear-armed rival, ready to launch within minutes. Some see deterrence as a savior, the thing that has kept the world from a nuclear war. Others hear empty talk and ask how owning nuclear weapons protects anyone from nuclear war. Either way, this system has paid for tens of thousands of weapons, their delivery systems, and an elaborate architecture of counter-weapons meant to blunt an attack. Trillions of dollars have gone into it, and no exact total exists because the real figures are classified. The claim at its center is simple: deterrence keeps the world safe. The question it never answers is what happens when deterrence fails.

The SIOP

As the stockpile multiplied, so did the separate war plans of each service branch. Until December 1960, the Army, Navy and Air Force chiefs each controlled their own nuclear weapons, delivery systems and target lists. To head off the mayhem of competing plans, the secretary of defense ordered them merged into one. That is how the Single Integrated Operational Plan, the SIOP, got its name. Strategic Air Command, later U.S. Strategic Command, employed 280,000 people in 1960. Of those, 1,300 were pulled into a Joint Strategic Target Planning Staff whose only job was folding the individual target packages into a single target deck.

The ambition was not new. Less than two weeks after World War II ended, the U.S. military asked for 466 nuclear bombs. It was the first known systematic estimate of what it thought it needed to destroy Soviet and Manchurian targets.

What John Rubel and his colleagues learned that December day, in a bunker beneath Offutt Air Force Base in Nebraska, was the merged plan. Activated, it would kill at least 600 million people. It launched the entire U.S. military in a first strike at Moscow. Defense scientists had calculated that 275 million people would die in the first hour, with at least 325 million more dead from radioactive fallout over the following six months. Roughly half of those deaths fell in countries that were not at war with America but sat in the crosswinds, including as many as 300 million Chinese. That number left out the 100 million or so Americans a Soviet counterattack would likely kill. It also left out another 100 million in North and South America dead from fallout over roughly six months, and the uncounted who would starve as the climate shifted from a world set on fire.

A second classified plan followed, an attack on China delivered by a different speaker. He worked his way to a chart showing deaths from fallout alone: 300 million, half of China's population.

A Lone Objection

The next morning a smaller group met: Rubel, the secretary of defense, the Joint Chiefs of Staff, the secretaries of the army, navy and air force, and the commandant of the marines. The chairman, Lyman Lemnitzer, commended everyone on a fine and difficult job. The army chief, George Decker, said much the same. The chief naval officer, Arleigh Burke, took his pipe from his jaw and repeated it. General Thomas White of the air force ground out similar empty praise in a gravelly voice that carried an air of authority. No one objected to the killing of 600 million people in a government-led first strike. Not one of the Joint Chiefs, not the secretary of defense, not Rubel.

Then one man did. General David M. Shoup, commandant of the Marine Corps and a Medal of Honor recipient from World War II, was a short man in rimless glasses whom Rubel thought could have passed for a schoolteacher from a rural Midwestern town. In a calm, level voice he said a plan that murdered 300 million Chinese in a war that might not even be theirs was not a good plan, and that it was not the American way. The room went silent. Nobody moved a muscle. Nobody seconded him.

Wannsee and the Plan Today

Decades later, in a 2008 memoir, Rubel compared the meeting at Offutt to the Wannsee Conference of January 1942. There, a group of German officials spent ninety minutes agreeing on how to carry out the genocide of Europe's Jews while winning the war they were then winning. Nearing the end of his life, he described witnessing a room full of disciplined, meticulous men, all thinking the same way, calmly planning to wipe out half the people on nearly a third of the earth's surface.

The Final Solution called for exterminating Europe's millions of Jews and millions more the Nazis deemed subhuman. The SIOP called for the mass extermination of some 600 million people the scientists expected to catch in the crosswinds. The Final Solution was carried out. The SIOP never has been, not so far.

A similar plan still exists, still classified. What began as the SIOP is now the Operational Plan, or OPLAN. Hans Kristensen and Matt Korda of the Nuclear Information Project, working with the Federation of American Scientists, identified the current one as OPLAN 8010-12. It is described as a family of plans aimed at four named adversaries: Russia, China, North Korea and Iran.

The U.S. stockpile is smaller than in 1960 but still holds 1,770 deployed weapons, most on ready-for-launch status, with thousands more in reserve for an inventory above 5,000 warheads. Russia has 1,674 deployed weapons, most ready for launch, and a reserve that brings its inventory to roughly the same size. In 1985, Ronald Reagan and Mikhail Gorbachev warned in a joint statement that a nuclear war cannot be won and must never be fought. In 2022, President Biden said the prospect of nuclear Armageddon had reached a terrifying new high. Nuclear War: A Scenario is built on the effects of this kind of mass extermination plan.

Key Takeaways

The plan was not an accident of escalation. Killing civilians was the design of American war planning, and that design persists in classified form today. In Rubel's account, most of the projected dead in the 1960 plan were people in nations that were not at war with the United States.

Deterrence works as a justification, not a protection. It has paid for tens of thousands of weapons and trillions in spending, while leaving unanswered what happens at the moment it fails.

The suppression of Hiroshima survivor testimony was not a side effect of strategy. Keeping control over what was known about what nuclear weapons do to human bodies was treated as an asset for fighting the next war.

Dissent inside the planning apparatus accomplishes nothing. The one commander who objected to the plan's morality found out when no one in the room moved to support him.

Part II: The First 24 Minutes

Overview

A missile launch is detected. Only minutes separate what is seen from what must be decided. Nobody involved can wait for certainty, and nothing about the choice can be taken back.

At 4:03 a.m. in North Korea, a Hwasong-17 lifts off a 22-wheeled transporter. A car-sized sensor in the U.S. Space-Based Infrared System catches the exhaust's heat within tenths of a second, from 22,300 miles up. Alarms read BALLISTIC MISSILE LAUNCH, ALERT!

Raw data lands at the Aerospace Data Facility at Buckley Space Force Base in Aurora, Colorado. NSA staff send encrypted alerts to three underground command centers: the Missile Warning Center at Cheyenne Mountain in Colorado, the National Military Command Center at the Pentagon, and the Global Operations Center at Offutt Air Force Base in Nebraska.

Nearly every nation announces an ICBM test, because no one wants to start a nuclear war by accident. North Korea is the exception. More than 100 missiles were test-fired between January 2022 and May 2023, including nuclear-capable weapons able to reach the continental United States, with none announced. Analyst Joseph Bermudez Jr. says the silence preserves surprise and reinforces propaganda. Launches are multiplying anyway. The U.S. Space Force tracked 1,968 worldwide in 2021, a figure that rose more than three and a half times in 2022. This missile's trajectory is wrong. It is neither bound for space nor arcing toward the Sea of Japan.

Beneath the Pentagon, the National Military Command Center is the primary command and control facility in a nuclear war, and possibly a target. It is 3:03 p.m. in Washington on March 30. Algorithms have begun predicting the trajectory, but no target area can be fixed yet.

Ground radar cannot confirm the attack yet. Clear Space Force Station outside Fairbanks, Alaska, stays blind for roughly eight more minutes, until the missile reaches its Midcourse Phase.

Inside Cheyenne Mountain, alarms signal a nuclear launch alert, and track data point to a target on the East Coast. Everyone thinks the same thing: one single incoming missile makes no sense. A preemptive North Korean strike would bring overwhelming, unconditional nuclear force. Former defense secretary William Perry calls it a Bolt out of the Blue, and in the nuclear age it amounts to national suicide. A surprise attack is meant to decapitate, and that takes everything, not one missile, against a nation holding 1,770 deployed nuclear weapons.

Beneath Offutt Air Force Base in Nebraska, a bunker built to withstand a 1-megaton hit houses U.S. Strategic Command. Its commander advises the president directly, with no one in between. On the Battle Deck, three clocks tick: RED IMPACT, the time until the enemy missile lands; BLUE IMPACT, the time until the U.S. counterattack strikes; and SAFE ESCAPE, the time left for the commander to escape. Getting the Blue Impact clock running is the priority.

Nine miles from Cheyenne Mountain, officers gather at a larger command center at NORAD headquarters on Peterson Space Force Base. Nuclear command and control relies on redundancy. The NORAD commander prepares to send his nuclear attack assessment to the secretary of defense and the chairman of the Joint Chiefs at the Pentagon.

Two minutes after detection, the secretary of defense and the chairman of the Joint Chiefs run through the Pentagon's E-ring and down into the tunnel to the National Military Command Center, conceived in 1948 as the War Room and in continuous use ever since. The NORAD commander, on secure satellite video from Colorado, confirms the worst case: an ICBM is inbound to the East Coast.

An ICBM carries nuclear weapons across continents to kill millions. In 1960, the Pentagon's chief scientist, Herb York, asked a team of defense scientists known as the Jason scientists to calculate how long one would take to travel from a Soviet launchpad to an American city. The answer was 26 minutes and 40 seconds, 1,600 seconds from launch to annihilation. The secret assessment survives in York's papers at the Geisel Library in San Diego, and its verdict is that nuclear war cannot be won. It moves too fast to be steered.

The flight has three phases: Boost Phase, five minutes, ending when the warhead is released at 500 to 700 miles altitude; Midcourse Phase, twenty minutes of coasting through space; and Terminal Phase, 1.6 minutes, or 100 seconds, from reentry to detonation. A launch from the Korean peninsula reaches the East Coast in 33 minutes, by MIT professor emeritus Theodore Postol's calculation. Once launched, an ICBM cannot be recalled.

Once ground radar confirms the attack, a Cold War policy takes over. Launch on Warning means the United States prepares to launch the moment its sensors detect an incoming strike, rather than absorbing a blow first. That is why most of the deployed arsenal sits on Hair-Trigger Alert. Paul Nitze called the policy inexcusably dangerous, and no president who campaigned against it has changed it.

At three minutes, the vice-chairman of the Joint Chiefs sees that the missile is not following one of the preset trajectories North Korean test launches take out to open water, and tells the secretary of defense to get the president on comms.

In the White House, the national security advisor hands the president the phone. He asks whether this is a test and is told that it is not. Six minutes remain for him to deliberate and choose which weapons to launch, about the time it takes to brew a ten-cup pot of coffee. Reagan wrote of that window, "how could anyone apply reason at a time like that?" Presidents since Kennedy have been underinformed about their part in nuclear war, Perry says, and some seem not to want to know.

The Hwasong-17 rides to its launch site on a 22-wheeled transporter erector launcher. America's 400 ICBMs sit in silos whose locations are published, while North Korea's launchers keep moving on dirt roads. The Russian-made RD-250 engine, probably stolen from a storage unit after the Soviet collapse, is what lets the missile reach the East Coast. The scientists Richard Garwin and Ted Postol warned in 2017 that it had compressed decades of development into four months.

Richard Garwin, who helped build the first hydrogen bomb and the first spy satellites, argues in a 2017 paper with Theodore Postol that North Korea's geography, with blind spots around the North Pole, makes conventional missile defense close to impossible. Their proposed fix is armed MQ-9 Reaper drones patrolling the Sea of Japan off the North Korean coast around the clock. Postol puts the window at 240 to 290 seconds into flight, because shortly after, the missile finishes powered flight and goes dark. Satellites see hot rocket exhaust and nothing more, a black hole in national defense. Postol says Washington disregarded the idea, and Garwin says a proposed joint initiative with Russia went nowhere.

By four and a half minutes, boost phase is ending and there is no system to fire. The Missile Defense Agency's Ground-Based Midcourse Defense, built after North Korea accelerated its ICBM program in the early 2000s, rests on forty-four interceptors, each fifty-four feet tall and carrying a 140-pound exoatmospheric kill vehicle. The warhead travels at roughly 14,000 miles per hour and the kill vehicle at 20,000, making a hit, in the agency's phrase, "akin to shooting a bullet with a bullet." No test succeeded between 2010 and 2013, and the Government Accountability Office later called the system's development flawed. Nine of twenty hit-to-kill tests failed, about a 55 percent chance. Forty interceptors sit at Fort Greely, Alaska, and four at Vandenberg.

The sequence has ten steps, three already complete: the enemy launches; infrared satellites detect the launch; ground radars track the missile through boost phase.

The warhead bus then releases decoys to confuse the kill vehicle's sensors. At nine minutes, ground radar at Clear Space Force Station confirms a single object over the horizon, a backup for satellites. Such systems have misread the world before. In October 1960, Thule's computers read the moon rising over Norway as a thousand attacking ICBMs. In 1979, a NORAD simulation tape convinced William Perry, then undersecretary of defense, that he would have to wake President Carter to launch. Perry says the country is closer to accidental nuclear war now than it was during the Cold War.

At nine minutes and ten seconds, four interceptors fail in succession, with no time for shoot, look, shoot. Philip Coyle, a former chief weapons evaluator, says that "if you miss by an inch, you miss by a mile." The president, moved to the Presidential Emergency Operations Center beneath the East Wing, holds sole authority to launch, confirmed in a 2021 Congressional Research Service review. The aide beside him carries the Football, the satchel of emergency orders known as Presidential Emergency Action Documents. Lewis Merletti, who once led Clinton's Secret Service detail, says the Football must always be with the president, no exceptions. Its origin lies in December 1959, when Harold Agnew, who filmed Hiroshima from the air, found four F84F jets at a NATO base loaded with MK 7 bombs under Operation Reflex Action.

Agnew asked Don Cotter, an engineer at Sandia Laboratories, for an electronic lock on the MK 7's firing circuit, keyed to a three-digit code. Kennedy ordered it done. General Alfred D. Starbird objected that a pilot under Soviet attack could not obtain a code from the president in time. Glen McDuff, Agnew's coauthor on the declassified paper, says the question led somewhere no one had anticipated: if gravity bombs were coded, why not warheads and torpedoes? Kennedy decided they all should be, and the Permissive Action Link, or PAL, joined the original SIOP in a new system of control.

Inside the Football sits the Black Book, formally the Decisions Handbook: strike options, targets, estimated casualties. An identical copy occupies a safe on STRATCOM's Battle Deck, and Colonel Carolyn Bird, a former battle watch commander, has said the two contain the same information so both sides work from the same documents. Glen McDuff, a Los Alamos historian, says the book is named for how much death it holds. Hair-Trigger Alert keeps the arsenal launch-ready around the clock, and the triad comprises 400 ICBMs on land, 66 nuclear-capable bombers, B-52s and B-2s, and 14 submarines carrying ballistic missiles.

At 3:14 p.m., with federal employees still at work, the secretary of defense and the chairman of the Joint Chiefs face the president by satellite from beneath the Pentagon. The chairman tells him he belongs to the chain of communication, not the chain of command. Jon Wolfsthal describes a written script the lead officer at the National Military Command Center walks the president through. Forces must first reach DEFCON 1, a status never publicly attained. Casualties run to hundreds of thousands in Washington alone, and the chairman raises the figure past a million. The secretary of defense urges delay and calls to Moscow and Beijing, while the chairman presses to retaliate and decapitate, pressure known as jamming the president.

At STRATCOM, the commander presents the Alpha, Beta and Charlie options. The nuclear strike advisor, a post Lieutenant Colonel Kristopher Geelan once held, is expert on the handbook and the alert status of all U.S. forces. A weather officer calculates fallout deaths. For the 1960 plan against Moscow, John Rubel relayed figures reaching half of China's population, which today would exceed 700 million. Option Charlie's targets include Pyongyang, Yongbyon and Punggye-ri, with fallout estimated at 400,000 to 4 million Chinese nationals. The president reaches for the Biscuit, the laminated code card he must carry, and armed men burst in.

Two B-2s at Andersen Air Force Base on Guam prepare to launch, each carrying up to sixteen nuclear bombs. Three hours separate them from Pyongyang, and loading takes time, so a general nuclear war would be underway by their arrival, with nowhere left to refuel. FEMA's administrator, meanwhile, is pulled from Highway 267 and flown to Mount Weather under "the Program." Craig Fugate separates Continuity of Government, the constitutional succession, from the Continuity of Operations Plan, the essential functions agencies must reconstitute. Nuclear war is what FEMA calls a Bolt out of the Blue attack, and Fugate says population protection planning will not happen because everyone will be dead.

Fugate's clock is fifteen minutes. Once a nuclear detonation is detected, everything becomes a countdown, and the question is how quickly you can move and spin up, because at that speed miscalculation is inevitable. A well-informed FEMA chief would suspect the world is ending. The job is to stay fixed on the Program and ignore everything else. Confronting the reality of a Bolt out of the Blue attack would leave you paralyzed. After the blast, the first question is what remains and who remains, then how to keep them alive. Survival, not normal response, is the goal, and the federal government's best contribution is telling people with a radio how to self-survive: keep water supplies, drink Pedialyte, remain indoors, do not abandon your morals.

The armed men are the Counter Assault Team, the Secret Service's paramilitary unit, summoned by the special agent in charge, or SAC, who also ordered the three-man CAT Element. It was delayed because the SAC sent it for parachutes. Nighthawk One, Marine One, carries none. The SAC calls for KNEECAP, a Doomsday Plane carrying the president. CAT operators grab POTUS and pull him up, there to move him, not debate. A nuclear weapon will strike D.C. in nineteen minutes, and Marine One has four minutes to clear the complex or risk being too close to ground zero. The SAC worries most about nuclear EMP, a three-phase current burst that could kill the helicopter's electronics. The parachutes are for a tandem jump if the pilot cannot outrun the Red Clock. Over comms, the STRATCOM commander demands launch orders first. The chairman advises the Charlie option and Emergency Action Messages. The national security advisor argues the only way to avoid World War III is to wait and see if the U.S. is hit, while the chairman says there is a duty to launch on attack. The SecDef orders POTUS to Site R. The military aide closes the Football.

The STRATCOM commander is furious, shouting for POTUS. Without launch codes he is hamstrung. New data arrives from the National Reconnaissance Office's Aerospace Data Facility in Colorado: SBIRS sensors detected the hot exhaust of a submarine-launched ballistic missile that breached the ocean roughly 350 miles off the California coast. An SLBM can get closer and strike faster than an ICBM. Beale Air Force Base tracks it at hypersonic speed. One missile could be a misread. Two from separate launch sites crosses the threshold of a coordinated attack. Deterrence has collapsed. The only response is a counterattack to decapitate the enemy, to turn North Korea into a latter-day Carthage, into salted ground. The president is still in the stairwell. The Black Book is inside the Football.

The CIA warned Bill Clinton that North Korea might already have produced one or two warheads, and William Perry's mission to Pyongyang to buy the program out came home with nothing. North Korea admitted to years of covert weapons work in 2002, was producing weapons-grade plutonium by 2003, tested bombs in 2006 and 2009, and had thermonuclear weapons by 2016 and an ICBM able to reach anywhere in the world by 2017.

Behind the warheads sits a fleet of as many as eighty submarines; the U.S. Navy reports seventy-one. The boats are not nuclear-powered, but at least one likely carries a submarine-launched ballistic missile. Garwin judges an approach on the United States unlikely. Postol calls it tricky but not impossible.

The boat would be a modified 1950s Romeo-class diesel-electric submarine. On batteries it runs quiet, but recharging requires air, so the crew raises a snorkel and keeps it low against radar. Most power goes to hotel load, the heating, fans and oxygen that keep the crew alive. At five knots, Postol estimates seventy-two to ninety-six hours submerged and some five hundred nautical miles between snorkeling stops, so a five- to six-thousand-mile transit takes a couple of months.

The route hugs southern Alaska along the continental shelf, because deep water carries a snorkeler's noise for hundreds of miles. Shallow water does the opposite, returning so many echoes off the surface and bottom that sonar is nearly useless, the echo effect Postol has explained at the Pentagon. SOSUS, the Navy's Cold War Sound Surveillance System, works only in deep ocean.

The KN-23 is about twenty-five feet long, finned, with a range of 280 to 430 miles depending on payload and a 1,100-pound warhead. At Mach 6, roughly 4,600 miles per hour, it is less than 300 miles from shore, and the algorithmic targeting estimate is off by thirty-five miles. The target is Diablo Canyon Power Plant, 750 acres on a Pacific bluff whose two reactors each exceed a thousand megawatts, the only active nuclear plant in California as of 2024.

Aegis anti-ballistic missiles on Navy cruisers and destroyers hit their targets 85 percent of the time, but those ships are patrolling the Atlantic, the Pacific and the Persian Gulf, and every land-based THAAD system is overseas. Its low apogee, short flight time and fins put the KN-23 beyond those defenses anyway, and from under 400 miles it stays airborne less than three minutes. Article 15 of the Geneva Conventions Protocol II, which the Red Cross calls Rule 42, forbids making nuclear generating stations the object of attack even when they are military objectives. A nuclear strike on a reactor all but guarantees a core meltdown lasting thousands of years, the outcome officials call the Devil's Scenario. At Diablo, more than 2,500 spent fuel assemblies sit in Pacific-fed cooling pools, and the Nuclear Regulatory Commission's force-on-force drills have never rehearsed a nuclear missile strike, because no such defense exists. The warhead detonates, and the Devil's Scenario comes to pass.

Inside the near-silent Marine One, the president reads the launch codes aloud in an ordinary tone. Eighty-two nuclear warheads will fly at eighty-two targets on the northern half of the Korean peninsula, all but guaranteeing millions of deaths there, perhaps tens of millions, and the salvo remains a fraction of what the original SIOP called for against Moscow.

At 23 minutes and 30 seconds, the deputy director of operations in the National Military Command Center beneath the Pentagon confirms that the man who ordered the counterstrike is the president. The check is not voiceprint biometrics but challenge-and-response: two letters of the NATO phonetic alphabet, spoken by a human voice. "Foxtrot, Tango," the deputy says. "Yankee, Zulu," the president answers. Those are the last words they exchange, and two code words have set the end of the world in motion.

At 24 minutes, 1,600 miles from Washington, a Wyoming field holds hardpack snow, chain-link fence, motion detectors and a 110-ton concrete door lying flush with the earth. Ranchers see cowboy country. Strategic Command sees ICBM silo country, home to a third of the nation's 400 land-based missiles. Below the blast doors lies an eighty-foot-deep silo tunnel with four-foot-thick concrete walls, an elevator shaft to the living quarters and power station, and an escape tunnel. Most of the space is filled by a Minuteman III: 60 feet tall, 80,000 pounds, a 300-kiloton thermonuclear weapon in its nose cone.

At 1:27 p.m. local time, crews of the 90th Missile Wing leap from their seats at DEFCON 1. The land leg of the triad is considered the most vulnerable because silo locations are public and never move, which is why ICBMs go first under the "use them or lose them" strategy. Nothing launches faster, submarines included. Former launch officer Bruce Blair noted that arming, targeting and firing took 60 seconds in total.

One launch control center commands ten missiles, and each encrypted order from above runs about 150 characters. Five crews, Echo-01 among them, open safes bolted into the concrete and check the Sealed Authenticator System codes against those sent by the Emergency Action Team at the Pentagon, then each officer takes a small silver fire-control key with a key ring and a tab. They enter a war plan code into the launch computer. They retarget from open-ocean safety presets to option Charlie in the president's Black Book. They type in fifty new target coordinates. They turn the launch keys. Fifty Minuteman IIIs carrying 15 megatons of explosive yield are armed.

Fifty 110-ton silo doors blow open across Wyoming, and missiles rise through smoke and fire. A Minuteman leaves its silo in 3.4 seconds. After a minute the first-stage booster drops free and the second ignites. In roughly twelve minutes each reaches a cruising altitude of 500 to 700 miles. Before that, an old man who lives down the road from one of the facilities, a Russian spy, phones Moscow. Albert "Bud" Wheelon, the CIA's first science and technology director, said spies keep watch on American launch sites. "The ICBMs have launched," the old man says.

Key Takeaways:

• Nuclear warning and response run on a clock no human can meaningfully outthink. Heat from a launch registers from orbit in fractions of a second. Radar confirmation trails minutes behind. An ICBM's whole journey lasts well under half an hour, with no recall once it is away.
• A single inbound missile deserves to be treated as probable error long before it is treated as attack. Radar has mistaken the moon for a thousand warheads, and a training tape has nearly sent men to wake a president. Only a second launch from a separate site makes coordinated intent the reasonable conclusion.
• Missile defense cannot be counted on at any stage. Nothing can fire during boost. Midcourse interceptors face decoys and closing speeds that make a hit the exception. A short-range missile launched a few hundred miles offshore arrives in under three minutes.
• Because land-based silos are publicly sited and cannot move, the arsenal is built to launch on warning rather than absorb a first blow. The retaliation leaves before impact, and its size is fixed by pre-written options rather than by what actually happened.
• A diesel submarine recharging on a snorkel can close on a coastline where shallow water returns echoes that defeat sonar detection. The ocean depth that once guaranteed warning time no longer serves as a barrier.

Part III: The Next 24 Minutes

Overview

A blast goes off on the coast, and within seconds millions of people reach for their phones to watch it happen. The systems they depend on to tell them what is true are the same ones the event is already tearing apart.

Point Buchon, California

Near Point Buchon, four miles northwest of the Diablo Canyon Power Plant, a cattle rancher is blown off his feet by the blast of a 300-kiloton bomb. No sound or warning comes first, only a wall of dense air that strikes like a bulldozer and rips the clothes from his body. He was facing away from the explosion, which spares him blindness, and the low mountains and sloping cliffs between him and ground zero buffer some of the thermal radiation. With nothing to crush him and no glass to impale him, he gets to his feet and watches the mushroom cloud. He was born in July 1945, the same month Manhattan Project scientists tested Trinity in the Jornada del Muerto, the Journey of the Dead Man. He is standing in Diablo Canyon, the Devil's Gorge.

He finds his smartphone in the dirt, spared localized EMP effects by the surrounding terrain, and films. The footage travels the digital world in near real time, and X collapses under the traffic and goes down for good.

Diablo Canyon

The bomb was a 300-kiloton surface burst, which kills fewer people in the immediate vicinity than an airburst but produces far more fallout. Fallout takes its name from the way it falls out of the sky once the explosion passes and the shock wave subsides. The KN-23 submarine-launched missile, technology the Americans and Russians have pursued since the 1950s and North Korea acquired only recently, missed the center of its target by a few football fields, detonating 100 feet back from the cliff edge beneath the plant's southern employee parking lot. Everyone at the facility was incinerated in a fraction of a second.

Lynn Eden, a Stanford historian and expert on nuclear firestorms, describes a fireball expanding past a mile in diameter, enough to obliterate the 750-acre facility, half of it ocean. Diablo's reactor cores and the 2,000 metric tons of spent fuel stored there become radioactive lava boring into the earth, fulfilling the decommissioning panel's warning that fuel rods ignite at 1,652 degrees Fahrenheit. The more than 2,500 spent fuel assemblies burn.

Gordon Thompson, who has studied fuel storage since 1978, calculates that up to 100 percent of the plant's radioactive elements could be released, and that the fire cannot be extinguished because it cannot be approached. Frank von Hippel sizes the abandoned zone at one New Jersey, then corrects himself: two. Glen McDuff, a Los Alamos nuclear engineer, says bomb-struck fuel rods would shatter and seed the fallout, leaving central California unusable forever and contamination reaching Nevada, perhaps Colorado.

Moscow

At 10:29 p.m. Moscow time, the National Defense Management Center two miles from the Kremlin convenes an emergency teleconference of the General Staff. The officers who saw the rancher's video before X went dark know Russia had nothing to do with the attack, but deterrence is a psychological state, and once it fails the conclusions others draw cannot be controlled. Leon Panetta doubts much thought is given to the MAD chemistry at such a moment, or to who else might feel threatened.

Early Warning

Ted Postol says Russia's Tundra satellites lack look-down capability and so look sideways, where they can mistake cirrus clouds for missile plumes that are not there. At a 2015 Capitol Hill briefing on accidental nuclear war, he warned that such a misreading could set off a gigantic, spasmodic launch of all Russia's forces.

Marine One

Marine One, a Sikorsky VH-92A, races from D.C. airspace at more than 150 miles per hour toward Raven Rock, the Pentagon's alternate command center seventy miles away. The chairman of the Joint Chiefs presses the president for the universal unlock code. A selective unlock code lets crews fire only specified missiles at specified targets; the universal code overrides right of launch, the safeguard guaranteeing that only the president can authorize nuclear use.

The Universal Unlock Code

With the vice president at Arlington Cemetery laying a wreath and the line of succession in doubt, the chairman warns that if the president dies, STRATCOM cannot fire again unless it holds the universal unlock code. Crews hold the keys to fire but lack the codes to arm, target and launch, which the National Security Agency would have to generate. Right of launch keeps the count exact: authorize eighty-two warheads and eighty-two fly, never eighty-three. Invoking the razor's edge of the Maugham novel, the president authorizes the code rather than carry a billion deaths. If he or his successor becomes unlocatable, the STRATCOM commander can decide launches directly.

The Hole Over the North Pole

Fourteen minutes into the Osprey flight toward Site R, the secretary of defense tries to reach the Russian president. The V-22 outran Marine One and cleared the overpressure zone, and DISA relays everything to him and the vice-chairman. His urgency comes from a flaw in mutually assured destruction that Hans Kristensen has long flagged and the world ignores: a Minuteman III cannot reach North Korea without overflying Russia, so fifty ICBMs launched from Wyoming cross Russian territory. Leon Panetta calls the hole very dangerous and under-considered.

Osan Air Base

At Osan Air Base, an Air Force colonel and her South Korean counterpart study satellite imagery of movement less than fifty miles away. F-16s and A-10s taxi, and crews suit up in chemical, biological and radiation gear. A 2024 intelligence estimate puts North Korea at roughly fifty nuclear bombs, plus the world's largest chemical arsenal, 5,000 tons, much of it preloaded onto rockets. Seoul, forty miles north, holds 9.6 million people, a million more than New York City, with 26 million in the capital area. THAAD guards Osan, but military historian Reid Kirby notes it engages a few targets at a time, not hundreds.

The Jump

Marine One climbs to the altitude required. The president, clipped to a CAT operator, jumps with the special agent in charge, the military aide carrying the Football, and two remaining operators. Six parachutes open, then a flash of nuclear light, a fraction of a second of silence, and the blast.

Ground Zero

At the Pentagon a one-megaton thermonuclear weapon detonates, killing all 27,000 personnel inside, along with the headquarters staff of the six services, the eleven combatant commands and much of the intelligence community. The air superheats to 180 million degrees Fahrenheit, and a fireball 440 feet wide grows past a mile within ten seconds, its edges reaching the Lincoln Memorial and Crystal City. A blast wave flattens everything for three miles in every direction. In Ring 1, a circle nine miles across, structures change shape or collapse and rubble stands thirty feet high. One to 2 million people are dead or dying, and the government's nuclear advisory panel has long warned that the first ring will hold virtually no survivors, only foundations and basements.

Serpukhov-15

Ninety miles southwest of Moscow, the Serpukhov-15 satellite control center flashes First Echelon, Russia's highest nuclear alert, and reports an American ICBM launch. In 1983 Stanislav Petrov, doubting that anyone would start a war with five ICBMs, treated the warning as a false alarm and became known as the man who saved the world. Ted Postol argues that Tundra satellites misread clouds as plumes and miscount, so fifty Minutemen can look like more than a hundred, enough for a decapitation strike. This commander has none of Petrov's skepticism; he calls Moscow and reports an attack.

Proud Prophet

In 1983, with nearly 60,000 weapons ready, 35,804 in Russia and 23,305 in the United States, Reagan ordered the war game Proud Prophet to explore nuclear war's outcomes. It was designed by Thomas Schelling, a game theorist with economics degrees from Harvard and Berkeley who applied mathematical models to complex systems.

The Game Plays Out

Schelling shared the 2005 Nobel Memorial Prize in Economic Sciences. In Arms and Influence he argued that the capacity to inflict harm is bargaining power, and that using it is diplomacy, if a vicious kind. Proud Prophet was classified, built to show the most senior officers of Nuclear Command and Control how nuclear war would unfold once deterrence failed. For two weeks in 1983, more than 200 people met at the National War College in Washington.

Schelling's scenarios included:

• tactical strikes in a so-called limited nuclear war
• massive decapitation events
• preemptive launches begun in focused calm
• launches in crisis and in full-on panic
• runs with and without NATO, China and the UK

Every scenario ended the same way. No one wins a nuclear war once it begins, and there is no de-escalation. The outcome was the destruction of the United States, Russia and Europe, a Northern Hemisphere uninhabitable for decades, and at least half a billion dead in the opening exchange alone, followed by starvation for almost everyone who first survived. Paul Bracken, a Yale political scientist who played the game, called it a catastrophe that made all the wars of the previous five hundred years look small. The game stayed secret until its heavily redacted declassification in 2012.

Windows on the World

In 1997, Vice President Al Gore asked Bracken to run a different simulation, about a cyberattack on Wall Street, worried the newly popular internet left the banking system vulnerable. Seventy-five military and civilian personnel, including Wall Street bankers, took part. Cantor Fitzgerald arranged a banquet room on the top floor of the World Trade Center, in the restaurant called Windows on the World. The group concluded that data storage should move out of Manhattan, and firms shifted it to New Jersey and Long Island. What no one thought of was the actual method, flying a commercial airliner into the building where the game was being played. Fifteen of the participants were killed there on September 11, 2001.

Airborne and Undersea Command

At 36 minutes the STRATCOM commander runs for the E-4B Nightwatch, a retrofitted Boeing 747 kept ready around the clock because it fights nuclear war from the air. Hardened against electromagnetic pulse, the jet can stay aloft for twenty-four hours or more, and it can launch submarines, bombers and ICBMs even after their ground control centers have lost that ability.

At 37 minutes, sirens sound aboard the USS Nebraska, an Ohio-class submarine with 155 submariners aboard and the capacity to unleash twenty times the destruction of every explosive used in World War II, both atomic bombs included. Eight of its twenty tubes fire Trident II D5 missiles, fifteen seconds apart, each carrying four 455-kiloton warheads, thirty-two in all, bound for targets across North Korea. A first stage burns sixty-five seconds, then fourteen minutes of flight. An SLBM cannot be recalled.

Ring 1 and Ring 2

At 38 minutes, Ring 1, the nine-mile-wide zone, is a holocaust with casualties near 100 percent. The White House, the Capitol, the Supreme Court, the Treasury, the Library of Congress and the National Archives are gone. Ring 2, fifteen miles across, is ablaze. Los Alamos research on ignition thresholds found that pine needles, black rubber and most car upholstery ignite 7.5 miles from a one-megaton detonation. Stanford's Lynn Eden puts the energy of the resulting mass fire at fifteen to fifty times that of the detonation itself, with winds able to uproot trees three feet in diameter and pull people into the flames. No power means no water pumps, and radiation keeps first responders away for twenty-four to seventy-two hours. FEMA's own headquarters, 2.1 miles from the Pentagon, is flattened.

Raven Rock and the Moscow Call

The secretary of defense, newly blind, is helped out of the helicopter at Raven Rock and descends 650 feet into tunnels, bunkers and office-style rooms built to shelter 3,000 people, including the Joint Chiefs chairman and service branch leaders. A nuclear strike on Washington is a decapitation event, so only a handful escaped the city, and the marine helicopters carrying the president's executive staff have gone radio silent. The vice-chairman of the Joint Chiefs and the SecDef agree that nothing matters more than getting the Russian president on the phone.

They disagree on how to say it. The SecDef wants to wait, arguing that admitting the president is missing makes the country look weak. The vice-chairman insists there is no time, and that miscommunication carries the greater risk. Aides hunt for a Bible or any book for the swearing-in; Lyndon B. Johnson took the oath with his hand on a three-ring binder. DISA connects the call, the vice-chairman tells a Russian General Staff officer that the United States is under nuclear attack and means Russia no harm, and the officer replies that the Russian president is available only for the American president. Told Russia must take no military action until both presidents speak, the officer says the American president should have called by now, and the line goes dead.

NATO Invokes Article 5

At NATO headquarters in Brussels, it is 9:42 p.m. local time. The building, designed to resemble interlocking fingers, was meant for the Belgian Ministry of Defense. NATO invokes Article 5, its provision that an attack on one member is an attack on all, obligating members to come to the attacked party's aid with nuclear force if necessary. NATO owns no nuclear weapons, but the United States keeps 100 tactical bombs on NATO bases in Europe under a nuclear sharing arrangement: U.S. nuclear equipment is installed on jet fleets at six bases in five countries, and each host air force is assigned to carry out NATO strikes using U.S.-owned bombs. Nothing moves out of the WS3 vaults without authorization from the American president, and the British prime minister must also authorize it. No one knows where the president is. So the Nuclear Planning Group assembles on screens, translators work in more than a dozen languages, and everyone waits. Meanwhile aircrews at bases in Belgium, the Netherlands, Germany, Italy and Turkey receive Emergency Action Messages and prepare for war at DEFCON 1, crews rushing into concrete shelters built to take a 500-pound bomb hit.

Moscow Reads the Signals

Inside the National Defense Management Center in Moscow, the General Staff watches real-time NATO base activity through surveillance systems and signals intelligence, running intercepted communications through a basement supercomputer. Their conclusion is that NATO is preparing nuclear strikes. Russia has treated NATO as a primary adversary for decades, and during the Cold War it led its own alliance, the Warsaw Pact, whose newly declassified documents show members-Albania, Bulgaria, Czechoslovakia, East Germany, Hungary, Poland and Romania-kept their own nuclear attack plans against the West, even as Russia denies today having had a Launch on Warning policy in Soviet times. The two blocs postured and skirmished but never fought directly. After the Soviet Union dissolved in December 1991 the Warsaw Pact ended, and lands formerly under Russian control shifted toward the West, which many Russians experienced as a slap in the face. By 2014 Russian military doctrine had officially reinstated its anti-NATO position, declaring expansion into Russia's old neighborhood destabilizing.

Now generals watch fighters at Aviano in Italy and Kleine Brogel in Belgium, bases roughly 1,300 miles from Moscow, about the distance from Boston to Miami. Early-warning data from Tundra satellites, confirmed by Serpukhov-15, has activated the Kazbek communications system. Pavel Podvig says such confirmation triggers a high-alert status called “preliminary command,” after which everyone waits for an actual instruction to launch. The generals debate what to tell the Russian president while the future of Europe hangs on it. A 2020 Princeton University simulation found a Russia-NATO exchange would almost certainly escalate fast, with nearly 100 million dead or injured in the first few hours.

Restoring Deterrence

Eighty-two U.S. warheads have been fired at North Korea to decapitate its leadership before it launches again, under the doctrine of restoring deterrence. Deterrence is supposed to hold; when it fails, restoring it means changing an adversary's decision calculus about further escalation, in the phrasing of a 2020 White House briefing document. Admiral Charles A. Richard of STRATCOM later drew a distinction between deterrence day-to-day, in crisis, in conflict, and after first nuclear use, when the objective becomes restoration. That effort uses overwhelming force to pressure the attacker to capitulate and lose the capacity for further attack. According to the U.S. Army, the task ranges from difficult to impossible. North Korea's leader has almost certainly vanished into deeply buried bunkers, a tunnel and command labyrinth engineered over decades. A spokesman says the country has an extensive network of tunnels for infiltrating the South, protecting the regime and conducting nuclear tests. Defector accounts and South Korean military mapping suggest as many as 8,000 bombproof bunkers exist, but Western intelligence is thin. Director of National Intelligence Daniel Coats told Congress in 2017 that North Korea is among the hardest collection targets, with inconsistent intelligence, surveillance and reconnaissance coverage and gaps the North Koreans know about. Bruce Blair wrote in 2018 that intelligence gaps and hidden nuclear weapons and command bunkers would vex the United States in any campaign.

Destroying the leadership and its nuclear command and control is even harder. The country runs through a small loyalist group called the Personal Secretariat, most of whom stay with the leader always: political and military advisers alongside bodyguards, bankers, assistants and the children's nannies. Michael Madden of the Stimson Center describes a body that manages everything from schedules and haircuts to billions in foreign bank accounts, with one unit assassinating, another issuing military commands, and another controlling all security and military forces including nuclear weapons. Targeting such a group is nearly impossible when almost nothing is known about who they are or where they are. Pyongyang produces no public reports and has no independent press; most intelligence comes from satellites and defectors.

So the first thirty-two submarine-launched warheads strike counterforce targets:

1. North Korea's nuclear launch facilities
2. North Korea's Nuclear Command and Control facilities
3. North Korea's nuclear weapons production facilities

Decapitating the leadership requires killing millions, or tens of millions, of North Korean civilians. Some argue this violates the United Nations Charter and the Jus Ad Bellum principles of international law, including humanity and military necessity, and the long-standing requirements of distinction, proportionality and avoidance of unnecessary suffering. The Defense Department's logic is that destroying Pyongyang and swaths of countryside ends one decision-maker's madness, betting that killing millions of North Koreans is the best chance of stopping the killing of millions more Americans. Whether that restores deterrence is the open question.

The Hoejung-ni Launch

In an isolated mountain valley about twenty miles from the Chinese border, a steel door in a mountainside swings open. This is Hoejung-ni, a clandestine missile operating base with a secret city underground. From decades of archival satellite imagery the CIA has counted more than twenty aboveground structures, including a greenhouse for food and a lawn for parades, plus at least two underground facilities capable of housing a regiment-sized missile unit, numbers unknown. Imagery analyst Joseph Bermudez Jr. notes the mountaintop is covered in soil and tall mature vegetation designed to defeat satellite detection, and almost nothing is known of the interior; North Korea has never acknowledged the base and its national designator is unknown. A transporter-erector-launcher with a Hwasong-17 ICBM on its 22-wheeled flatbed rolls down a dirt road lined with a protective berm, stops, and fires. The missile ignites pine trees and sends boulders downhill as it climbs. The total number of North Korean bombs targeting the United States rises to three. SBIRS satellites detect the launch and notify command. With the Pentagon destroyed, tracking data flows through the Doomsday Plane to Site R beneath Raven Rock and to two surviving nuclear command centers: the Missile Warning Center at Cheyenne Mountain and the Global Operations Center beneath Offutt Air Force Base.

The GRU Source Reports

In Moscow, a colonel with the Main Intelligence Directorate, the GRU, is so absorbed by satellite television coverage of the American chaos that he neglects his voicemail. He has missed a message that arrived fifteen minutes earlier from a source he runs in Wyoming. The GRU gathers human intelligence through military attachés, foreign agents and spies, including an old man watching the Echo-01 Minuteman III ICBM launch facility in Wyoming. The colonel listens to a short numerically coded message following previously authorized reporting protocols, with numbers and Cyrillic letters verifying authenticity. Translated, it is one line: the ICBMs have launched. He picks up a secure telephone and starts making calls.

Contradictory Orders on the Air

At the CNN studio in Hudson Yards, staff have fled, including the anchor who was on air minutes ago. A younger journalist sits down and tells whoever is still watching that social media is largely down, that the broadcast may reach only some viewers, and that many TV and radio stations are off the air because of data center failures, carrier failures and abandoned jobs. She reads instructions from FEMA's Region 4 office in Atlanta, so far still functioning, starting with “Be Prepared for a Nuclear Explosion,” over a retouched decades-old Cold War mushroom cloud photograph. The guidance says to get inside, stay inside and stay tuned. A colleague hands her a highlighted 135-page guidebook from the Executive Office of the President titled “Planning Guidance for Response to a Nuclear Detonation,” and she reads what people should expect from a 10-kiloton detonation. She cannot know the bomb that hit Washington was 1 megaton, one hundred times the yield. The list she reads is a litany: incineration and blast, thermal and radiation injuries, beta burns, lethal doses out to twenty miles, communications and computer equipment destroyed, water and electrical systems destroyed, vehicles stalled, rubble thirty feet deep, injuries from collapsing structures and flying glass, ruptured gas lines, hazmat teams thwarted by crashed cars, downed lines and overturned vehicles blocking streets, firestorms beyond firefighting, contamination from fallout. Then she stops at a line that makes her shake her head: “After a nuclear detonation, priorities are likely to change.” Her phone pings with a FEMA Wireless Emergency Alert warning of a U.S. nuclear attack, telling people to seek shelter below ground and that evacuation may be necessary to avoid fire risks. Holding the phone to the camera, she points out that the two sets of FEMA instructions contradict each other. She falls silent.

Los Osos and Diablo Canyon

In the California beach community of Los Osos, a little over six miles north of Diablo Canyon, residents are in absolute terror. The rugged peaks between the plant and the town spared many from third-degree burns, carbonized limbs, impalement or being crushed by blast-toppled buildings, but geography cannot spare anyone from radiation death. If the exposed reactor cores do not kill them soon, fallout seeded with shattered spent fuel rods will. Some residents carry pocket dosimeters and ion chamber electroscopes, field-readable devices meant to guide tactical decisions after an unplanned radiological release; the ones in Los Osos have maxed out, and their owners understand what that means. The power is out. Television and FM radio are unavailable. The NOAA Weather Radio All Hazards network, long a stalwart of disaster information, has collapsed under overload, broadcasting an eerie unknown warning loop. Boats at sea tune to Channel 16 and hear only indiscernible sounds. The nuclear reactor oversight line is down. Pacific Gas and Electric, which operates the plant, has a troubling safety history that includes a $13.5 billion settlement tied to California fires, though this catastrophe is not its fault. Cell phones and computers that were plugged into wall sockets had their microprocessors destroyed. Battery-powered emergency sirens, for the most part, work as designed, pole-mounted horns screeching a steady three-to-five-minute wail without interruption.

The Central Coast After the Strike

The wailing means nuclear emergency, and roughly half a million people live within fifty miles of Diablo Canyon. Word spreads that Washington is also under attack. At 12:43 p.m. local time, cars back out of driveways, windows up, and children are still in school. Fallout travels with the wind, so evacuation is the only way to live.

Mount Buchon, the 1,800-foot peak between the plant and most towns, absorbed enough of the electromagnetic pulse to keep many cars running, though the streetlights are dead and traffic is a snarl. Eighteen minutes after a 300-kiloton bomb struck the plant, a radioactive firestorm races down the mountain. Ash and reactor concrete fall, seagulls drop burning, the sky darkens, and people vomit blood before abandoning their cars.

Star Sighting

Eight Trident missiles cross the atmosphere at 13,600 miles per hour, Mach 18, launched minutes earlier north of Tinian and bound for Pyongyang, 1,800 miles away. Missile expert Ted Postol calculates a fourteen-minute flight at a range angle of 38.26 degrees. The Tridents steer by an astronavigation method created for them: star sighting. Guidance systems manager Steven J. DiTullio explains that a submerged submarine cannot know its exact launch position, so the missile fixes its location in flight to correct the error. The primitive method resists hacking, which is why a ballistic missile carries no remote kill switch.

Komsomolsk-on-Amur

Russia's eastern counterpart to Serpukhov-15 sits near Komsomolsk-on-Amur, 600 miles from North Korea, interpreting the Tundra satellite constellation for missiles crossing the Pacific. At 5:44 a.m. local time, with the Kazbek system on preliminary command, the commander waits on Tundra. Electronic warfare analyst Thomas Withington, of the Royal United Services Institute, calculated that the Voronezh-DM radar at Barnaul began tracking the salvo three minutes and nine seconds after launch. Tundra now reports hundreds of objects from the south. Rocket exhaust appears only in boost phase, and the Tridents are in midcourse. The decoys they carry, thin crossed wires shaped like children's jacks, read to radar as hundreds of extra warheads. The commander calls Moscow.

The Black Book

The STRATCOM commander opens the Black Book to weigh further counterstrikes as a third missile heads for the United States. The secretary of defense and the vice-chairman join by satellite from Site R. The president is missing, though the quick reaction force has recovered the Football, and with the chairman dead the vice-chairman outranks everyone yet cannot command. Swearing in the secretary of defense collides with an unresolved post-9/11 statute on mass decapitation and Article II's line of succession. The national security advisor invokes the bumping procedure under Title 3, Section 19 of the Succession Act of 1947, while the president pro tempore drives himself from Maryland. Nothing can move, the secretary of defense says, until the Russian president takes his call.

History Lesson No. 8: Radiation Sickness

In May 1946, at the Omega Site in the Los Alamos woods, physicist Louis Slotin was training Alvin C. Graves on a plutonium core in an experiment nicknamed tickling the dragon's tail. Slotin had already decided to leave the Manhattan Project on moral grounds. He dropped a nuclear sphere, the material went critical, and he threw himself in front of Graves. He stayed to sketch where everyone had stood, and he died on day nine. Vomiting and numbness in his left hand came first, then swelling, diarrhea, blisters, cyanosis, and hemorrhaging skin. His bone marrow stem cells died, the tissue separating one organ from the next dissolved, bacteria from his own intestines invaded him, and organ failure followed. General Leslie Groves had assured Congress that death by radiation was "a very pleasant way to die."

The Siberian Bunker

The Russian president, woken in the night, holds a video conference from a bunker several floors underground, possibly beneath Mount Yamantau or Mount Kosvinsky, with his defense minister and the chief of the General Staff. Each has a Cheget briefcase, Russia's Football. From satellite television he watches millions flee New York, Los Angeles, San Francisco, and Chicago, and wonders who is in control. War planners on both sides have long asked who would abandon their post, while reporters in Des Moines and Little Rock keep broadcasting as big-city facilities go dark. Distance from ground zero decides survival, but for a leader only speed matters, and Reagan noted that a president has six minutes to respond.

Two Possibilities

Two possibilities confront the Russian president, and neither is comfortable: either the United States believes Russia carried out the strikes, or it knows Russia did not. Beside him is the Cheget, Russia's Football, linking him to the officers in Moscow who control the launch mechanisms, with its Black Book menu of strike options. Russia has 1,674 deployed weapons, most on hair-trigger alert.

For decades Moscow claimed it would absorb attacking warheads before retaliating. Putin said in 2018 that nuclear use requires the warning system to record a launch and to forecast trajectories and arrival times accurately. If Tundra satellites see missiles coming and a second system confirms their paths, Russia launches rather than waits to be hit.

What the Warning System Reported

The advisors report:

• A nuclear plant in California was hit twenty minutes ago.
• Ten minutes ago, a second bomb destroyed the Pentagon, the White House, the Congress and Washington.
• Tundra satellites recorded 100 or more Minuteman ICBMs leaving silos in Wyoming, and a GRU asset near one site saw the launch himself.
• Serpukhov-15 radars confirm more than 100 ICBMs crossing the North Pole.
• Three minutes ago, Voronezh radars at Barnaul and Irkutsk reported a submarine-launched salvo from the south, confirmed at Komsomolsk-on-Amur two minutes later.

Hundreds of warheads from two directions, forecast to land in about nine minutes.

Ninety Seconds

The secretary of the Security Council tells the president that ninety seconds remain. Has the American president called? No. An aide reads from a call sheet: the national security advisor, the secretary of defense, the vice-chairman of the Joint Chiefs. The Russian president reads the silence as a decapitation strike, a fear rooted in Soviet times. David Hoffman describes how that fear produced the Dead Hand, officially Perimeter: seismic sensors that could allegedly launch the arsenal if contact with Russia's commanders was lost.

The Launch

The bunker recalls 2003, when the Bush administration sold Congress a false account of Saddam Hussein's weapons of mass destruction and invaded Iraq. Paranoia and deterrence are both psychological phenomena, and a leader's fear of a preemptive strike has consequences as concrete as the warheads. The chief of the General Staff notes that Launch on Warning conditions have been met. The aide opens the Cheget, the president selects the most extreme option in the Black Book, and reads the codes aloud. From silos across eleven time zones, all but a few of roughly 1,000 missiles are aimed at the United States.

Two Arsenals

Russia's 312 ICBMs can carry up to 1,197 warheads, about 1,090 of them ready to launch, against 400 American ICBMs carrying 400, according to the Federation of American Scientists' Nuclear Notebook. At Dombarovsky in southwestern Siberia, the RS-28 Sarmat, known in the West as the Son of Satan, waits behind barbed wire, land mines and automated grenade launchers. America's own ICBMs are Minutemen, and the names make one arsenal evil and the other valiant.

Almost Certainly Targets

Sensors on U.S. early-warning satellites, 22,300 miles above the Earth, watch the launches fill the screens at the Aerospace Data Facility in Colorado. Forty interceptors remain of the original forty-four, thirty-six in Alaska and four at Vandenberg, and even a flawless performance would leave roughly 960 warheads falling. The commander sends encrypted messages to the Doomsday Plane and to:

• the Missile Warning Center inside Cheyenne Mountain
• the Global Operations Center beneath Offutt Air Force Base
• Site R, the Alternate National Military Command Center inside Raven Rock Mountain

Former vice admiral Michael J. Connor, who commanded U.S. submarine forces, called anything fixed destroyable. Everyone at those posts must now prepare to launch a counterattack and to survive a direct hit.

Key Takeaways

• Nuclear deterrence is a psychological condition rather than a physical safeguard, so once one attack is detected, waiting for confirmation can look like accepting decapitation while launching first can look like mere preemption.
• When a capital and its command staff are destroyed, the surviving chain of command can freeze on succession rules, lost codes, and contradictory emergency orders, while rival powers read the silence as evidence of an imminent strike.
• Warning systems built to detect missiles also manufacture false alarms: satellites confuse clouds with plumes, radars inflate decoys into warheads, and missiles aimed at one adversary can cross another's territory or arrive from an unexpected direction.
• A strike on a reactor site or spent fuel storage converts a local attack into a long-term regional contamination event, because burning fuel cannot be fought like an ordinary fire and fallout ignores evacuation routes and national borders.
• No nuclear exchange stays limited; war games and historical cases converge on escalation toward Northern Hemisphere catastrophe, with no winner, no reliable de-escalation, and no way to rebuild an adversary's restraint after first use without mass civilian death.

Part IV: The Next (And Final) 24 Minutes

Overview

In the final minutes before a nuclear launch decision, the chain of command is fractured and the window to act is closing. Protocol demands immediate action; the person with launch authority hesitates. Who prevails when the clock runs out?

Six Minutes at Cheyenne Mountain

At Cheyenne Mountain in Colorado, the commander takes in the tracking data and prepares emergency messages for the alternate command bunkers and military headquarters, just as he did when this began forty-eight minutes ago. The commanders of U.S. Nuclear Command and Control assemble by satellite and radio. The officers who were at the Pentagon are dead. The secretary of defense and the vice chairman call in from the bunker beneath Raven Rock Mountain in Pennsylvania, and with the entire Russian ICBM force launched, the SecDef is now acting president. In the Doomsday Plane circling above the American Midwest, the STRATCOM commander waits for launch orders with the Black Book open in front of him.

The assessment is short: about one thousand Russian nuclear warheads are headed for the United States. Six minutes remain to choose a counterattack, and sooner is better. The former CIA director General Michael Hayden explains why: all-out nuclear war is "designed for speed and decisiveness," and "not designed to debate the decision." More hellfire is coming, because the Russian navy's submarine-launched ballistic missiles have yet to launch.

Three Boats Under the Ice

Where the Arctic Ocean meets the Barents Sea, near the Franz Josef Land archipelago, three Russian submarines break through more than five feet of floating sea ice, surfacing within a few hundred feet of one another, exactly as three boats managed in a March 2021 military drill. This is no drill. Two are Delta-IV class subs, long a workhorse of the fleet. The third is a newer Borei class, faster and stealthier than its Soviet-era predecessors. Each carries sixteen nuclear-tipped missiles, each missile four 100-kiloton warheads: 192 warheads and 19.2 megatons of yield inside three hulls.

The boats launch at five-second intervals, each emptying itself in eighty seconds, the same figure Ted Postol used more than forty years ago when he briefed U.S. Navy officials at the Pentagon, a cartoonlike drawing serving as his teaching tool. Some missiles cross the North Pole and come down on U.S. Nuclear Command and Control. Others run due south into Europe, at NATO's Nuclear Command and Control and its nuclear-capable bomber bases. At about the same time, two more conning towers surface in the Atlantic, a few hundred miles off the East Coast. The Defense Department put a map of its submarine tracking data into its Fiscal Year 2021 budget request to Congress.

The speed with which these boats launch and strike many targets nearly at once makes them devastating. Declassified war games keep reaching the same conclusion: when deterrence fails, civilization is destroyed. The Atlantic boats fire, drop beneath the water and vanish. In the Arctic, three conning towers slip back under the ice.

Books, Procedures, Steps, Lists

For U.S. Nuclear Command and Control, whether to launch is not open for debate. Every protocol and every decade of doctrine since deterrence was invented indicates that the time is now. One man still has a point to argue. The acting president, flash-blind, makes his case from a leather chair in the bunker at Raven Rock Mountain in Pennsylvania: as acting president, he controls any launch decision. He is technically right. So is the STRATCOM commander, who holds the universal unlock code. Morale in the bunker is shock, furor and despair.

Leon Panetta, who led the CIA, the White House staff and the Pentagon, calls this "not a place you want to find yourself," somewhere a person could be summoned into a mountain to handle a nuclear war. Books, procedures, steps and lists tell you what to do in a crisis, he says, but no one prepares for nuclear war. Deterrence has failed, and so have the strategies meant to make its failure survivable: "restoring deterrence," "escalate to de-escalate," "resolve to restrain." Each one is exposed as a fantasy, as are "tailored deterrence" and "flexible retaliation," which promised nuclear war could be stopped once it began. The despair in the bunker comes from what many have grasped for decades: nuclear war ends only in nuclear holocaust. The STRATCOM commander does not argue. He tells the acting president, now commander in chief, that five minutes are left, and that the action he must take is to open the Black Book.

The Counterstrike Lands

Twenty more nuclear bombs hit North Korea's nuclear facilities. Yongbyon's radiochemical lab, uranium enrichment plant and two reactors explode, and the same meltdown that consumed Diablo Canyon begins there, spent fuel rods spreading radiation over land left uninhabitable for an interminable time.

Sohae Satellite Launching Station and its engine test facility are hit thirty miles from Dandong, China, population two million, so the killing and wounding of hundreds of thousands of Chinese citizens drags China and its 410 nuclear weapons into the war. Punggye-ri, where underground tests between 2006 and 2017 turned purchased or stolen plans into the program that started this, sits 110 miles from Russia, with Vladivostok another eighty-five miles north. Fifty more ICBMs are inbound, the fifty Russia mistook for a hundred or more. Eighty-two warheads kill millions of North Koreans, none of whom did anything to bring this on themselves.

Beneath Mt. Paektu

North Korea's leader is not in Pyongyang. He is 1,900 feet under Mt. Paektu in Samjiyon County, in a bunker considered as close to bomb-proof as any in Russia or the United States. He means to ride out the war there and may die in the process.

A 2021 Defense Intelligence Agency report called North Korea's underground program the largest and most fortified in the world, thousands of bunkers built to withstand American bunker-busters. Soviet engineers shared the Cold War tunneling techniques, and in the 1960s they used a benchmark: a bomber carrying a nine-megaton B-53 could destroy a facility sunk to 1,889 feet in wet soil or wet soft rock. This bunker sits at 1,900.

The Wild Card

He holds a weapon built to strip the United States of electricity, and it settles a score. Nearly a decade earlier the West released a satellite image of the Korean peninsula at night, the north dark and the south bright, and news coverage mocked the country as "electricity-poor" and "energy bankrupt."

For decades the U.S. EMP Commission has warned Congress that a weapon detonated high over the homeland would destroy the power grid. Peter Pry, its long-serving chief of staff and a former CIA officer, said shortly before his death in 2022 that a North Korean high-altitude EMP over America would be "Electric Armageddon."

Jim Oberg, a NASA rocket scientist turned NBC News space consultant, went to North Korea in 2012 a skeptic and returned convinced, calling it the Doomsday Scenario and warning that such a satellite must never overfly the United States. In February 2016 the country launched a satellite with a payload large enough for a small nuclear warhead, on a south-to-north orbit over Washington. Henry Cooper, former director of the Missile Defense Agency, put the worst case on record: an indefinite grid shutdown, and the death within a year of up to 90 percent of all Americans.

Seoul and the Sarin Salvo

At Osan Air Base in South Korea, a U.S. commander watches drone feeds from less than fifty miles away. Hundreds of North Korean launch vehicles emerge, and Hwasong-9 missiles leave rail-mobile launchers. More than ten thousand shells and 240-millimeter rockets fly at Osan, Camp Humphreys and central Seoul, carrying chemical agents, and THAAD, America's billion-dollar missile defense, cannot cope: the rockets are too thin to identify and engage en masse.

Military historian Reid Kirby, writing in the Bulletin of the Atomic Scientists, calls it a "Sea of Sarin" and calculates that a 240-ton Sarin attack, at his rate of 10,800 rounds every fifteen minutes and eight kilograms of Sarin per rocket, would inflict a 25 percent casualty rate on Seoul: between 650,000 and 2.5 million civilians dead and another 1 to 4 million injured.

A President in the Woods

In Boyds, Maryland, the president lies on the forest floor, bleeding out and helpless, hidden by the dense canopy from what he thinks is a rescue helicopter overhead.

The Detonation

At Redstone Arsenal in Huntsville, Alabama, the commander watches a satellite explode on the radar screen. North Korea has just detonated a Super-EMP. Electricity surges and stops.

The weapon fired 300 miles above the United States, over Omaha, Nebraska. It harms no one on the ground and causes no structural damage; at first it would seem like a power outage to the millions sheltering in basements. Steven Wax, chief scientist at the Defense Threat Reduction Agency, warned in 2016 that a detonation at that altitude over Omaha would generate an EMP covering the contiguous United States. The pulse arrives in three phases, E1, E2 and E3, defeating industrial-strength surge suppressors and lightning arresters at once.

Collateral Effects

The pulse destroys major portions of all three American grids at once, the West Coast, East Coast and Texas grids, and interconnected extra-high-voltage transformers fail in sequence. Major General George Touhill, whose monograph on EMP remains classified, describes equipment thrown out of control and out of sync, and says the collateral effects are the problem rather than the burst. Roughly 11,000 power plants, 22,000 generators and 55,000 substations fail in a cascade, taking much of the country's 642,000 miles of high-voltage transmission line and 6.3 million miles of distribution line with them. EMP commissioner William Graham told the Senate Armed Services Committee in 2008 that ten percent of America's 280 million registered vehicles would suddenly stop running.

The Control Architecture Goes Down

Physicist Richard Garwin, architect of the Ivy Mike thermonuclear device, whose 1954 paper on EMP is also still classified, calls the collapse of SCADA systems the real problem. SCADA stands for Supervisory Control and Data Acquisition. It gathers information from industrial equipment across critical infrastructure and delivers it to the people running the system. It governs railroad routers and lift-gates on dams, refinery transmissions, assembly lines and air traffic control, port facilities, fiber optics, GPS and hazardous materials, and the defense industry's industrial base in its entirety.

Trains collide, elevators stop between floors or plunge, satellites including the International Space Station drift and begin falling, and fifty-three nuclear power plants run on backup systems with finite time. Fly-by-wire airliners lose wing and tail control, while older 747s are spared, the Doomsday Planes the Defense Department flies, because a pedal and yoke stay mechanically linked to the control surfaces. Pipeline valves rupture by the millions, boilers blow, dams burst, and within fifteen minutes disease-carrying insects swarm.

Apes on a Treadmill

In 1975, Foreign Policy published an essay by Paul C. Warnke, a defense official turned nuclear disarmament advocate, who condemned both the danger and the waste of the arms race. He described a monkey-see-monkey-do phenomenon in which every participant copied the others' aggressive moves while no one could win: apes on a treadmill, slaving away. The image stuck; the argument faded.

In 2007, scientists writing in the Proceedings of the National Academy of Sciences gave the idea a twist. Testing bipedalism, the theory that ancestors stood upright because it burned less energy than knuckle-walking, they fitted five chimpanzees and four people with oxygen masks and put them on treadmills. Some chimps refused to cooperate. Anthropologist David Raichlen told Reuters journalist Will Dunham that the apes were smart enough to hit the stop button when they were done, or to jump off. If the apes can get off the treadmill, why can't we?

Minute 57: The Last Strike

Russian submarines surface off the East Coast and strike U.S. Strategic Command at Offutt Air Force Base in Nebraska, whose underground Global Operations Center was built to survive one 1-megaton hit, not a simultaneous bombardment of 100-kiloton warheads. Defense scientists calculated decades ago that a single 1-megaton bomb destroys 80 to 100 square miles, while ten 100-kiloton bombs cover more than twice that. Offutt, greater Omaha and most of its nearly half a million residents are incinerated. The president, lying in the woods some forty-five miles southeast, catches fire and carbonizes.

Air bases are destroyed as well, and the missiles they hold are already gone: Barksdale Air Force Base in Louisiana, Malmstrom Air Force Base in Montana, Minot Air Force Base in North Dakota, F. E. Warren Air Force Base in Wyoming. Malmstrom's 150 Minuteman III ICBMs have launched and are on their way to Russia. All that remains of American command and control is the Doomsday Planes in the air and the Trident submarines at sea, and the 1960 Single Integrated Operational Plan for General Nuclear War laid out a war that is now only numbers.

Minute 58: Across Europe

Russian submarine-launched missiles from the Arctic hit NATO air bases in Belgium, Germany, the Netherlands, Italy and Turkey, while multiple-warhead ICBMs on depressed trajectories destroy London, Paris, Berlin, Brussels, Amsterdam, Rome, Ankara, Athens, Kyiv and more. The Colosseum, Notre Dame de Paris, Hagia Sophia, Stonehenge and the Parthenon vanish in succession.

Minute 59: The Last Launch Orders

Flying in circles over the Atlantic, the last E-6B Doomsday planes trail five-mile-long antennae and bank into a spiral, transmitting final Emergency Action Messages over the very low frequency system at thirty-five characters per second, slower than first-generation dial-up modems but enough to reach Trident submarines thousands of miles away. The last missiles launch about fifteen minutes later. No one, including the submarine crews, will ever learn what they hit. Everyone loses.

Minute 72: One Thousand Warheads

A twenty-minute barrage of 1,000 Russian warheads falls on a nation already ruined by 192 Russian submarine-launched warheads and two North Korean thermonuclear bombs, the third North Korean ICBM having failed on reentry. Every ground zero superheats to 180 million degrees Fahrenheit, and a thousand fireballs more than a mile across drive blast waves through a thousand American towns. Tens of millions are dead; tens of millions of survivors suffer fatal third-degree burns, and the mega-fires burn over 100 square miles each. Khrushchev said the survivors would envy the dead. The first nuclear test, on July 16, 1945, took place at Jornada del Muerto, the Journey of the Dead Man, and that is where the story ends.

Key Takeaways

• The system for ordering and executing a nuclear launch is built to compress decision time, not to encourage deliberation; once deterrence breaks down, launch becomes almost automatic.
• Submarines hidden under ice and at sea can deliver hundreds of warheads on command, population, and allied targets at once, so any nuclear exchange immediately threatens the entire command architecture.
• The counterstrike on North Korea draws China and Russia into the war, demonstrating that even a regional nuclear conflict cannot be contained.
• A nuclear burst high above the central United States would not kill by blast but by disabling the power grids and the industrial control systems that run water, transport, communications, and nuclear plant cooling, producing a nationwide catastrophe.
• The arms race is a trap no participant can win, and every doctrine meant to keep nuclear war limited or survivable fails in practice; the final minutes show only total exchange and no meaningful victory.