The First Seventy-two Hours

The quantified, lethal contamination of the fleet was the concrete consequence that made the ensuing showdown between radiological safety officers and the Navy’s operational timeline unavoidable. Ships floated in the lagoon, their decks catching the Pacific sun. Superstructures remained intact. Hulls rode the water as they had before the test. They looked like ships that could be saved. They looked like assets that could be recovered. They looked like evidence that could be studied. But every surface emitted radiation. Every compartment held contamination. Every approach carried risk. The Fleet of Intended Ruin had received its sacrifice, and the sacrifice was not finished.

At dawn on July 26, 1946, Stafford Warren stood on the deck of the USS Mount McKinley, checking the batteries on a survey Geiger counter before boarding the small boat that would take him to the target fleet. The instrument’s earphone hung around his neck, its cable coiled against his chest. He had ordered his teams to carry them always, to listen as well as look. The sound would tell them what their eyes could not see. Around him, the radiological safety officers of Joint Task Force One donned their protective gear—canvas coveralls, rubber boots, gloves taped at the wrist. A new ritual of war, invented twenty-four hours earlier and already inadequate.

The base surge from Test Baker had coated the target ships with a spray that no hose could wash off. Warren’s teams had watched it happen from the observation ships, the wall of radioactive mist rising from the lagoon and rolling outward on the wind. They had recorded its passage with their instruments, and now they had to go in after it. The schedule called for re-entry within hours, for boarding parties and damage assessment and the great work of documenting what the atomic age had wrought upon naval architecture. The schedule had been written before anyone understood what an underwater detonation would do.

Warren climbed down the ladder to the waiting boat. The coxswain held her steady against the flagship’s hull. The medical colonel from Los Alamos—the man who had supervised the health of the Manhattan Project’s workers, who had seen what radiation could do to human tissue—settled onto the bench and nodded toward the lagoon. The coxswain opened the throttle.

The water around them was clear. The sky above them was blue. The atoll looked as it had looked for thousands of years, a ring of coral islets around a calm lagoon, the sort of place a man might dream of retiring. Warren’s Geiger counter chattered in his ear, a staccato clicking that grew faster as the boat approached the target array. The instrument was not designed for this. None of them were.

The USS Saratoga loomed ahead, her flight deck tilted at a slight angle where the blast had damaged her hull. The aircraft carrier had been one of the primary targets, and the bomb had gone off close enough to lift her from the water and slam her back down. She looked salvageable. She looked like a ship that could be pumped out and patched and sailed home. Warren’s boat drew alongside her hull, and the Geiger counter screamed.

Spray coated everything. The flight deck, the gun emplacements, the aircraft lashed to the deck, the safety lines and the bulkheads and the rails. Warren held the probe against the hull and watched the needle pin itself against the stop. The reading exceeded the instrument’s capacity to measure. He pulled the probe back and marked the location on his chart. One ship. One reading. One data point in a map of contamination that would take weeks to complete.

Goats and pigs and rats waited in the Saratoga’s hold, tethered in compartments throughout the ship, their bodies arranged to measure the effects of blast and radiation on living tissue. Some had died in the detonation. Others had survived the concussion but had been doused with the radioactive spray. Warren’s teams would have to retrieve them, would have to document their positions and their conditions and their eventual fates. Evidence. Data. Witnesses, after a fashion.

The boat moved on. The Japanese battleship Nagato lay half-submerged, her stern already settling into the lagoon floor. The ship that had carried Admiral Yamamoto’s staff through the attack on Pearl Harbor, the vessel that had once been the pride of the Imperial Japanese Navy, now listed to starboard, her superstructure mangled by the blast. Spray had coated her too. Warren’s counter screamed again as they approached, the readings higher here than on the Saratoga, the contamination more concentrated where the base surge had first deposited its load.

Nagato would not be salvaged. She would become a grave for the animals placed aboard her, for the instruments that had recorded her death, for the history she carried in her steel plates. Warren marked her position and her readings and moved on. Eighty-nine other ships waited in the target array.

Aboard the support vessels, the first boarding parties were already forming. Sailors in white uniforms stood at rails with fire hoses, waiting for the order to approach the contaminated ships and wash them down. The Navy had trained for this. Procedures existed. The belief persisted that enough water and enough soap and enough elbow grease could solve any problem, even one that had never before existed.

Hoses turned out to be part of the problem. One fire boat had to be taken out of service when its crew began showing elevated readings on their film badges. The water they pumped from the lagoon was itself contaminated, each gallon carrying particles of fission products that the hoses merely spread across the decks they were meant to clean. The more they washed, the more they contaminated. The more they scrubbed, the more they stirred the radioactive material into the air, where the wind could carry it to the support ships.

Film badges told the story. Between August 6 and 9, the badges recorded sixty-seven overdoses—exposures above the safety limits that Warren’s team had established. Sixty-seven men who had gone aboard the target ships or worked on the fire boats or stood too close to the contaminated water. Sixty-seven men whose bodies had absorbed radiation that would stay with them for the rest of their lives, whether they knew it or not.

Geiger counters were failing too. More than half of the three hundred twenty instruments available to the task force shorted out and became unavailable during those first days. Salt water and humidity and the sheer intensity of the radiation combined to overwhelm the delicate electronics. Warren’s teams were flying blind, or nearly so, their instruments unable to measure the very thing they had been designed to detect.

The Mount McKinley received the reports in a steady stream. The flagship’s communications center logged each one, each reading, each failure. Reboarding the target ships within forty-eight hours remained on the schedule. Damage assessment teams were supposed to document the effects of the blast. The fleet was meant to be salvaged, studied, and either repaired or scuttled according to the findings. None of this accounted for contamination that could not be washed off.

Admiral William H.P. Blandy sat in his cabin, the reports stacked on his desk. The test director had promised Congress and the press that Operation Crossroads would demonstrate the Navy’s ability to survive atomic war. The tests would prove that ships could withstand the blast, that crews could fight through the aftermath, that the Navy remained relevant in an age of weapons that could destroy cities in a single flash. The first test, Able, had been a disappointment in that regard—the bomb had missed its aim point by nearly half a mile, sinking only five ships and damaging others in ways that repair crews could address.

Baker had been different. Baker had gone off exactly where they placed it, underwater, beneath the lagoon. Baker had done everything the physicists said it would do and more. The column of water that rose from the detonation point, the “underwater cathedral” that the observers had watched in awe, had come down as a spray that coated the fleet with fission products. The base surge had rolled across the lagoon like a fog, carrying its invisible poison to ships that had survived the blast itself. Now the fleet sat there, contaminated, unapproachable, a monument to a weapon that could not be defended against.

A third test, Charlie, appeared on Blandy’s schedule for the spring. Another underwater shot, another demonstration, another chance to gather data on the effects of atomic weapons on naval vessels. But the data from Baker was already overwhelming the teams assigned to collect it. Ships were too hot to board. Instruments were failing. Men were being exposed to radiation that no one fully understood.

Warren returned to the Mount McKinley in the late afternoon of July 26. He went directly to Blandy’s cabin, the Geiger counter still hanging from his neck, the earphone still coiled against his chest. The medical colonel had seen enough radiation in his career to know what it could do. He had seen the flash burns at Hiroshima, the shadow patterns on walls where bodies had blocked the light. He had seen the autopsies and the tissue samples and the slow deaths from exposure. Contamination on those ships was not a problem that could be solved by sailors with fire hoses.

The conversation between Warren and Blandy was not recorded. But the outcome was clear in the orders that followed. The reboarding schedule was delayed. Damage assessment teams were held back. Fire boats were recalled. The flagship sat at anchor in the lagoon, surrounded by a fleet that could not be approached, while Warren’s radiological officers compiled their readings and their recommendations.

Seventy-two hours after Test Baker became a slow-motion crisis, each hour bringing new data that contradicted the assumptions underlying the operational plan. Ships floated. Ships looked intact. Ships could not be boarded without exposing the boarding parties to dangerous levels of radiation. Procedures for damage control, developed over decades of conventional warfare, had no answer for contamination that soaked into paint and rust and the pores of the steel itself.

At dawn on July 27, Warren sent another survey team into the lagoon. Boats moved from ship to ship, taking readings at the hulls, the decks, the superstructures. Each reading was logged and reported. Each confirmed what the day before had suggested: contamination was not uniform. Some ships were hotter than others, depending on where the base surge had deposited its load, depending on the shape of the hull and the angle of the spray. But all of them were contaminated; all emitted radiation at levels exceeding safety limits for occupational exposure.

The USS Wainwright was one of the first ships to be remanned. The destroyer had been moored at the edge of the target array, far enough from the detonation point to survive the blast with minimal damage. Her crew had been evacuated before the test, as all target-ship crews had been, and now they were brought back to sail her out of the lagoon. Decontamination teams had done their best, scrubbing her decks and hosing down her superstructure. Readings were low enough to allow boarding, barely. The crew went aboard and prepared to get underway.

Wainwright made it out of the lagoon under her own power. She sailed for the United States, where she would be inspected and studied and eventually scrapped. She was one of the lucky ones. Twelve target ships in total were deemed lightly contaminated enough to be remanned and sailed back to the United States by their crews. Twelve ships out of nearly ninety. The rest remained in the lagoon, too hot to approach, too valuable to abandon, too contaminated to salvage.

Animals were another matter. Goats and pigs and rats that had been placed aboard the target ships as test subjects had to be retrieved, living or dead. Their bodies held evidence of what radiation did to biological tissue. Their positions aboard the ships documented the patterns of exposure. Their autopsies would reveal the internal damage that Geiger counters could not measure. Warren’s teams went aboard the accessible ships with body bags and stretchers, collecting the animals that had survived and the carcasses of those that had not.

Goats on the Saratoga were still alive when the first boarding party reached her. They stood in their pens, coats matted with spray, eyes following the men who approached with Geiger counters and lead-lined containers. Readings around them were high. Readings on them were higher. Spray had soaked into their fur and their skin, and they breathed it in with every breath. The boarding party loaded them onto stretchers and carried them to the waiting boats. They would be taken to a laboratory and studied. They would be sacrificed and dissected. Their tissues would be analyzed for plutonium and fission products, their bones checked for the radioactive strontium that mimicked calcium and settled in the marrow.

Autoradiographs came later. X-ray images made by radiation coming from the fish that had been caught in the lagoon, their scales outlined by alpha particles from plutonium that had distributed throughout their bodies, out to the edges of their fins. Fish had absorbed contamination from the water, the same water that fire boats were pumping onto the decks of the target ships. The same water that sailors were standing in as they worked. The same water that surrounded the support fleet and filled the lagoon and connected everything to everything else.

By July 28, Warren’s teams had surveyed enough of the target ships to understand how far contamination reached beyond any single hull or deck: it was a problem of scale no previous naval operation had faced. The base surge had deposited its load unevenly—concentrated on ships closest to detonation point and scattered across those farther out—but spray had also spread with wind, carrying particles to vessels outside primary zone; even lagoon itself was contaminated by stirred-up water from blast and surge and boat movement spreading fission products into new configurations with each wave.

Support fleet was not immune. Ships positioned miles from the target array, carrying observers and press and Congressmen, had escaped direct contamination. But their boats had gone into the lagoon. Their crews had handled lines and equipment that had been in contact with contaminated water. Film badges were showing exposures that accumulated with each day of operation.

Warren drafted a memorandum to Blandy on the evening of July 28. Language was clinical, tone measured, implications devastating. The target fleet could not be salvaged with the resources and procedures currently available. Contamination was too widespread, too persistent, too dangerous. Men who went aboard those ships were being exposed to radiation that would increase their lifetime risk of cancer, that would damage their cells and their genes in ways that would not appear for years. The schedule had to be revised. The third test had to be reconsidered. The entire operation had to be rethought.

Blandy read the memorandum in his cabin. The admiral had his own pressures, his own schedule, his own promises to keep. The Joint Chiefs wanted data on the effects of atomic weapons on naval vessels. Congress wanted proof that the Navy was still relevant. The press wanted stories, and the public wanted to know that their tax dollars were being well spent. The operation had already cost millions of dollars and thousands of man-hours. Target ships were assets, valuable vessels that could be repaired and returned to service. The schedule called for salvage and study and a third test in the spring.

Warren’s memorandum sat on the desk between them, the scientific imperative for caution meeting the operational imperative for action. The collision had been building since the first planning sessions for Operation Crossroads, since the first discussions of how to test the atomic bomb against the Navy’s ships. Procedures existed. Schedules existed. A century of experience with conventional weapons and conventional damage existed. The atomic bomb was not conventional.

Seventy-two hours since Test Baker had demonstrated that. The detonation itself had been spectacular, a column of water rising thousands of feet into the air, spray spreading across the lagoon, waves radiating outward from the blast. But the real story had begun after the spectacle ended. The real story was in Geiger counters that screamed at the hulls of target ships, in film badges that recorded overdoses, in fire boats that spread contamination instead of washing it away.

The real story was in the choices that had to be made. Target ships sat in the lagoon, decks gleaming, superstructures intact. But every approach carried risk. Every boarding party added to the tally of exposed men. Every hour of delay pushed the schedule further from the original plan.

Mount McKinley rode at anchor, flagship of a task force that had accomplished its primary objective and discovered that the objective was only the beginning. The atomic age had brought new weapons, and the new weapons had brought new problems. The Navy was learning, slowly, that procedures of the past were inadequate to realities of the present. Radiological safety officers were learning that their instruments could measure the danger but could not solve it. Sailors were learning that some enemies could not be seen or fought or defeated.

First seventy-two hours after Test Baker ended with the fleet still in the lagoon, contamination still spreading, schedule still demanding action. Warren’s teams had documented the scope of the problem. Blandy’s staff had revised the operational timeline. Boarding parties had collected their data and their animals and their readings. Film badges had recorded their exposures. Geiger counters had failed and been replaced and failed again.

Third test, Charlie, still appeared on the schedule. Salvage operations still appeared on the planning boards. Target ships still floated in the lagoon, waiting for orders that would send men aboard them to scrub their decks and pump their bilges and try to make them seaworthy again. Procedures still called for action, for recovery, for demonstration that ships could survive atomic war.

But contamination was still there. Fission products were still emitting their radiation, breaking down into daughter elements that emitted more radiation, settling into the steel and the paint and the water. The unwashable mist had done its work, and the work was not finished. The fleet that had been assembled to demonstrate the Navy’s resilience now demonstrated its vulnerability. Ships that had been positioned to study the effects of atomic weapons now became subjects of that study themselves, contaminated beyond recovery, trapped in a lagoon that was itself a hazard.

The trapped support fleet and the contaminated, unapproachable target ships created a standoff between the operational schedule and the reality of radiological safety.