The Day We Lost the H-Bomb: Cold War, Hot Nukes, and the Worst Nuclear Weapons Disaster in History

— rookie airmen who could barely fly a plane or bomb a target. These kids would die unless he whipped them into shape. And whip them he did. His men called him “Iron Ass” for his relentless training regimen — exhausted pilots would return from a bombing run ready for bed, only to be ordered back in the plane to practice bad weather takeoffs. Bombardiers had to memorize stacks of photographs in preparation for future missions. LeMay worked as hard as his troops, becoming a brilliant strategist. During his time in Europe, he devised new flying formations and bombing techniques that saved bombers and helped pick off German factories. On August 17, 1943, the day of the mission described in the passage above, the surviving B-17s flew to Regensburg and dropped 303 tons of bombs on a Messerschmitt aircraft plant, one of the most accurate strategic bombing runs of the war.

By the time LeMay arrived in Guam, the AAF bombing campaign against Japan seemed a pretty dismal failure. The Navy, not the AAF, deserved the credit for gains in the Pacific, having crushed the Japanese fleet, mined the Japanese harbors, and captured valuable islands. The Navy brass, riding high, were even eyeing the powerful new B-29 bombers, plotting to steal them from the Army and incorporate them into the Navy. If LeMay didn't get some results soon, Washington might scrap the strategic bombing campaign altogether. Failure in Japan would seriously jeopardize the case for an independent Air Force.

Luckily, LeMay had a new weapon at his disposal, one that would alter the fate of strategic bombing in Japan: napalm, a jellied gasoline that stuck to almost anything and burned slow and steady. In a city like Tokyo, where about 98 percent of the buildings were made of wood, incendiary bombs promised massive destruction. When his 325 planes left Guam, Saipan, and Tinian on March 9, most carried six to eight tons of napalm “bomblets,” designed to scatter when dropped and ignite buildings at a number of points.

LeMay put a trusted brigadier general named Thomas Power in charge of the raid. Power was to lead the planes to Tokyo, drop his bombs, and then circle at 10,000 feet to observe the rest of the operation. At around 2:30 a.m., Power, circling Tokyo, sent his first message to LeMay: “Bombing the primary target visually. Large fires observed, flak moderate. Fighter opposition nil.” Soon, messages arrived from other bombers reporting “conflagration.” The raid devastated Tokyo. The flaming napalm stuck to the flimsy wooden houses, starting small fires that quickly spread into giant firestorms. The flames burned so brightly that the bomber pilots could read their watch dials by the glow. The blaze burned nearly seventeen square miles of the city to cinders, destroying 18 percent of its industry. Somewhere between 80,000 and 100,000 people died, burned to death when their hair, clothes, and houses caught fire or suffocated when the firestorm sucked away oxygen. The smell of burning flesh hung in the air for days.

The carnage sparked little sympathy in America. “When you kill 100,000 people, civilians, you cross some sort of moral divide,” said the historian Edward Drea. “Yet at the time, it was generally accepted that this was fair treatment, that the Japanese deserved this, that they had brought this on themselves.” If LeMay had any moral qualms about the slaughter, he never acknowledged them. For him, it was an obvious trade: Japanese lives for American. “No matter how you slice it, you're going to kill an awful lot of civilians. Thousands and thousands. But if you don't destroy the Japanese industry, we're going to have to invade Japan,” he wrote in his autobiography, Mission with LeMay.

“We're at war with Japan. We were attacked by Japan. Do you want to kill Japanese, or would you rather have Americans killed?”

When the B-29s returned from Tokyo on the morning of March 10, LeMay ordered them to get back into the air that evening and bomb Nagoya, Japan's second largest city. But after a look at the exhausted crews, he postponed the Nagoya raid for twenty-four hours. Over ten days, LeMay's B29s firebombed aircraft plants in Nagoya, steel mills in Osaka, and the port of Kobe, destroying thirty-three square miles of those cities. He bombed Japan until he ran out of bombs and started again when the Navy brought him more. Throughout April, May, and June 1945, LeMay's bombers pounded the cities of Japan. By summer, LeMay announced that strategic bombing could probably force Japan's surrender by October.

The end came even sooner. On August 7, 1945, U.S. forces dropped an atomic bomb named “Little Boy” on the city of Hiroshima. Nine days later, they dropped a second, “Fat Man,” on Nagasaki.

That evening, Japan surrendered. The war was over.