{"id":9758929,"date":"2026-08-05T19:16:22","date_gmt":"2026-08-05T17:16:22","guid":{"rendered":"https:\/\/migflug.com\/jetflights\/hiroshima-nagasaki-atomic-missions\/"},"modified":"2026-08-05T19:34:04","modified_gmt":"2026-08-05T17:34:04","slug":"hiroshima-nagasaki-atomic-missions","status":"publish","type":"post","link":"https:\/\/migflug.com\/jetflights\/fr\/hiroshima-nagasaki-atomic-missions\/","title":{"rendered":"Forty-Three Seconds Over Hiroshima"},"content":{"rendered":"<style>.et_pb_title_container h1.entry-title { padding-top: 40px !important; }<\/style>\r\n<p><em>Part 9 of The Race for the Bomb, an Afterburner focus series. Everything in this series converges here: the physics of Part 1, the exiles of Part 2, the bomb of Part 5, the aircraft of Part 7, the fire doctrine of Part 8. Two missions, four days, one surrender.<\/em><\/p>\r\n<p>Tinian, the Mariana Islands, around two o&rsquo;clock in the morning of 6 August 1945. On a coral hardstand at North Field \u2014 four parallel 8,000-foot runways, in that summer the largest airfield on Earth \u2014 a stripped silver B-29 stands ringed by floodlights, cameras and something like a hundred photographers and officers. The name Enola Gay was painted under the pilot&rsquo;s window only yesterday. Its commander, Colonel Paul Tibbets, is baffled by the crowd; he later wrote that it was full-scale Hollywood premiere treatment, and that he half expected to see MGM&rsquo;s lion walk onto the field.<\/p>\r\n<p>The floodlights have a reason. Inside the forward bomb bay hangs a four-and-a-half-ton object the crews call Little Boy, containing most of the uranium-235 that K-25 and the Calutron Girls of Part 5 spent two years separating, atom by atom. It is a gun-type bomb of a design that has never been tested. Nobody worried much about that; the physics was considered certain. What worried Navy Captain William Parsons, the weaponeer, was arithmetic of a different kind: four B-29s had crashed on takeoff from these runways in the past week, and a crash with this cargo could remove North Field, and every aircraft and man on it, from the map.<\/p>\r\n<p>So Parsons made a decision that gives the mission its first white-knuckle scene: he would arm the bomb in flight, in the bomb bay, a procedure he had never performed. Asked by his general whether he had ever done it, he answered: no sir, I don&rsquo;t know how \u2014 but I&rsquo;ve got all afternoon to learn. He practised in the dark, cramped bay until his hands bled.<\/p>\r\n<div style=\"background:#f5f5f5;border:1px solid #e0e0e0;border-radius:8px;padding:20px 24px;margin:28px 0\"><p style=\"margin:0 0 10px;font-weight:700;font-size:17px\">Quick Facts: The Atomic Missions<\/p><ul style=\"margin:0;padding-left:20px;line-height:1.8\"><li><strong>21 days<\/strong> \u2014 from the Trinity test to Hiroshima<\/li><li><strong>About 43 seconds<\/strong> \u2014 Little Boy&rsquo;s fall from 31,060 feet to its burst point ~580 m over the city<\/li><li><strong>~15 and ~21 kilotons<\/strong> \u2014 yields of Little Boy (untested gun design) and Fat Man (Trinity&rsquo;s implosion design)<\/li><li><strong>Less than 1 kg<\/strong> of Little Boy&rsquo;s 64 kg of uranium actually fissioned<\/li><li><strong>3 bomb runs, about 50 minutes<\/strong> \u2014 Bockscar&rsquo;s futile attempts over cloud-covered Kokura on 9 August<\/li><li><strong>Under 5 minutes of fuel<\/strong> \u2014 what remained after Bockscar&rsquo;s emergency landing on Okinawa<\/li><li><strong>90,000&ndash;166,000 and 60,000&ndash;80,000<\/strong> \u2014 estimated dead in Hiroshima and Nagasaki by the end of 1945<\/li><\/ul><\/div>\r\n<h2 style=\"padding-top:22px\">The Outfit That Couldn&rsquo;t Say What It Did<\/h2>\r\n<p>The 509th Composite Group had been built for exactly one job, and built strangely. Activated in December 1944 at Wendover, a salt-flats base on the Utah-Nevada line, it was handed to Paul Tibbets \u2014 chosen at 29, already the man who had led the first American heavy-bomber raid on occupied Europe and test-flown the B-29 through its worst teething. His unit flew the stripped Silverplate aircraft of Part 7 and practised a single manoeuvre obsessively: release one large bomb from 31,000 feet, then wrench the aircraft into a diving 155-plus-degree turn, calculated by the Los Alamos scientists as the only geometry that put enough miles between a B-29 and a nuclear shockwave. Through 1945 the group dropped huge orange practice bombs the crews called pumpkins \u2014 including 49 live ones on Japanese targets in late July, combat rehearsals flown to make lone high-flying B-29s an unremarkable sight over Japan.<\/p>\r\n<p>Target selection, meanwhile, had produced history&rsquo;s strangest reprieve. The committee&rsquo;s first-choice city, untouched and militarily plausible, was Kyoto \u2014 until Secretary of War Henry Stimson, who had visited the ancient capital as a tourist in 1926 and understood what its destruction would mean, struck it from the list personally and held the line with Truman at Potsdam. The persistent legend that Kyoto was spared because Stimson honeymooned there is just that, a legend \u2014 he married in 1893 \u2014 but the sparing itself is documented fact. Hiroshima, an army headquarters city on a river delta, moved to the top of the list.<\/p>\r\n\r\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px;width:100%\"><img data-opt-id=1742851762  fetchpriority=\"high\" decoding=\"async\" class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" width=\"1024\" src=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:xywA.cacb\/w:auto\/h:auto\/q:mauto\/ig:avif\/https:\/\/migflug.com\/jetflights\/wp-content\/uploads\/sites\/4\/2026\/08\/little-boy-bomb-tinian.jpg\" alt=\"Little Boy on its transport dolly on Tinian\" style=\"width:100%;height:auto;max-width:100%;display:block;border-radius:6px\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">Little Boy: 64 kilograms of uranium-235, a gun mechanism, and a design never tested before use. Photo: US government, public domain<\/figcaption><\/figure>\r\n<h2 style=\"padding-top:22px\">Six Hours to Hiroshima<\/h2>\r\n<p>Enola Gay lifted off at 2:45 a.m. with twelve men, Parsons arming his bomb in the bay as the Marianas fell behind. Over Iwo Jima the strike force formed: two escort B-29s with instruments and cameras, a weather aircraft an hour ahead. The weather plane&rsquo;s report sealed the choice: Hiroshima clear. At 8:15:15 local time, from 31,060 feet, bombardier Thomas Ferebee released on the T-shaped Aioi Bridge; the aircraft leapt, suddenly five tons lighter, and Tibbets threw it into the practised turn. Little Boy fell for about 43 seconds and detonated some 580 metres above a clinic courtyard, 250 metres from the aiming point, with a yield around 15,000 tons of TNT. Of its 64 kilograms of uranium, less than one actually fissioned; a fraction of a gram of matter became energy, and a city of a quarter-million people ceased to function in a breath.<\/p>\r\n<p>The only man aboard looking straight at it was the tail gunner, Bob Caron, whom Tibbets had told to describe everything over the intercom like a radio reporter. His words, and the two shockwaves that slapped the fleeing bomber, are the mission&rsquo;s cockpit record.<\/p>\r\n\r\n<div style=\"background:#f8f9fa;border-left:4px solid #d32f2f;padding:20px 22px;margin:18px 0 24px;border-radius:0 8px 8px 0;font-size:16px;line-height:1.7;display:flex;gap:20px;align-items:flex-start\"><div><em>&ldquo;A column of smoke rising fast. It has a fiery red core. A bubbling mass, purple-gray in color, with that red core. It&rsquo;s all turbulent. Fires are springing up everywhere... It&rsquo;s like a mass of bubbling molasses... a peep into hell.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>S\/Sgt. George &ldquo;Bob&rdquo; Caron<\/strong> &mdash; Enola Gay tail gunner, intercom description, 6 August 1945<\/div><\/div><\/div>\r\n\r\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px;width:100%\"><img data-opt-id=1687736467  fetchpriority=\"high\" decoding=\"async\" class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" width=\"1024\" src=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:5ihf.caca\/w:auto\/h:auto\/q:mauto\/ig:avif\/https:\/\/migflug.com\/jetflights\/wp-content\/uploads\/sites\/4\/2026\/08\/paul-tibbets-enola-gay-cockpit-wave.jpg\" alt=\"Paul Tibbets waving from the cockpit of the Enola Gay\" style=\"width:100%;height:auto;max-width:100%;display:block;border-radius:6px\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">Tibbets waves from the cockpit before takeoff. He was chosen for the command at 29, and flew the mission at 30. Photo: US Air Force, public domain<\/figcaption><\/figure>\r\n<p>Co-pilot Robert Lewis kept a log for a newspaperman who had been bumped from the flight. What he wrote in it \u2014 my God, what have we done? \u2014 became the mission&rsquo;s conscience in print; his crewmates always insisted that what he actually said aloud in the moment was considerably earthier. Both versions are true to the morning.<\/p>\r\n<h2 style=\"padding-top:22px\">Below the Cloud<\/h2>\r\n<p>On the ground there was no mission narrative, only a white flash the survivors named pikadon \u2014 flash-boom. Around 70,000 to 80,000 people died at once or nearly so; by the end of 1945, deaths from burns and radiation brought the toll to somewhere between 90,000 and 166,000 \u2014 the ranges are wide because the records burned with the record offices. Ninety percent of the dead were civilians. At the Sumitomo Bank, 260 metres from the burst, the flash bleached the stone steps around a person sitting waiting for the doors to open, leaving the shadow that now sits behind glass in the Peace Memorial Museum. The gutted dome of the riverside industrial hall, almost directly beneath the burst, still stands where it stood.<\/p>\r\n\r\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px;width:100%\"><img data-opt-id=552376587  decoding=\"async\" class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" width=\"1024\" src=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:dp07.cacc\/w:auto\/h:auto\/q:mauto\/ig:avif\/https:\/\/migflug.com\/jetflights\/wp-content\/uploads\/sites\/4\/2026\/08\/hiroshima-ground-devastation-1945.jpg\" alt=\"The devastated centre of Hiroshima seen from the Red Cross Hospital\" style=\"width:100%;height:auto;max-width:100%;display:block;border-radius:6px\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">Hiroshima from the Red Cross Hospital roof. The records of who died here burned with the city&rsquo;s record offices. Photo: US government, public domain<\/figcaption><\/figure>\r\n<p>Dr. Michihiko Hachiya, director of a hospital 1,500 metres from the hypocentre, was wounded in the blast and began a diary that day that remains the indispensable ground-level account. A year later, John Hersey&rsquo;s report Hiroshima, following six survivors, filled an entire issue of The New Yorker and has never been out of print. Sixteen hours after the strike, half a world away, came the first official word anyone in Japan or America heard of what the flash had been.<\/p>\r\n\r\n<div style=\"background:#f8f9fa;border-left:4px solid #5C91FF;padding:20px 22px;margin:18px 0 24px;border-radius:0 8px 8px 0;font-size:16px;line-height:1.7;display:flex;gap:20px;align-items:flex-start\"><div><em>&ldquo;If they do not now accept our terms they may expect a rain of ruin from the air, the like of which has never been seen on this earth.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>President Harry S. Truman<\/strong> &mdash; statement announcing the Hiroshima strike, 6 August 1945<\/div><\/div><\/div>\r\n\r\n<div style=\"margin:24px 0\"><div style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden\"><iframe class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" src=\"https:\/\/www.youtube.com\/embed\/Rx30OujANyg\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;border-radius:8px\" allowfullscreen><\/iframe><\/div><p style=\"font-size:13px;color:#777;text-align:center;font-style:italic;margin:6px 0 0\">Period USAAF footage: the loading pits on Tinian, the Enola Gay, and the strike \u2014 the mission as the cameras recorded it.<\/p><\/div>\r\n<h2 style=\"padding-top:22px\">Kokura&rsquo;s Luck, Nagasaki&rsquo;s Fate<\/h2>\r\n<p>The second mission, three days later, was everything the first was not: a cascade of malfunctions flown on nerve. The aircraft, Bockscar, commanded by 25-year-old Major Charles Sweeney, carried Fat Man \u2014 the plutonium implosion design proven at Trinity. Before takeoff a fuel transfer pump failed, trapping 640 gallons in a reserve tank: usable weight, unusable fuel. Tibbets ruled: go anyway. A missed rendezvous burned 45 more minutes. And over the primary target \u2014 Kokura, home to a great arsenal \u2014 the crew found haze and smoke where the forecast had promised clarity. Three bomb runs over fifty minutes, flak blooming closer, fighters climbing; the weaponeer, Commander Frederick Ashworth, made the call, and Bockscar turned for the secondary. Japan still uses the phrase Kokura&rsquo;s luck for escaping a doom you never saw.<\/p>\r\n<p>Nagasaki lay under cloud too. With fuel now critical, bombardier Kermit Beahan found a twenty-second window through the overcast at 11:02 a.m. and released. Fat Man burst 500 metres over the Urakami valley, three kilometres off the intended aiming point; the ridgelines confined the 21-kiloton blast, and the valley \u2014 home to Mitsubishi works, and to the largest Christian community in Japan \u2014 was destroyed in Hiroshima&rsquo;s image: roughly 40,000 dead at once, 60,000 to 80,000 by year&rsquo;s end. Among those under the second cloud was a Mitsubishi engineer named Tsutomu Yamaguchi, who had been burned at Hiroshima on business three days earlier, had come home to Nagasaki, and was describing the first bomb to a sceptical boss when the room filled with the same white light. He lived to 93, the only officially recognised survivor of both.<\/p>\r\n\r\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px;width:100%\"><img data-opt-id=555722075  decoding=\"async\" class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" width=\"1024\" src=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:dp07.cacc\/w:auto\/h:auto\/q:mauto\/ig:avif\/https:\/\/migflug.com\/jetflights\/wp-content\/uploads\/sites\/4\/2026\/08\/nagasaki-mushroom-cloud-charles-levy.jpg\" alt=\"The mushroom cloud over Nagasaki, 9 August 1945\" style=\"width:100%;height:auto;max-width:100%;display:block;border-radius:6px\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">The Nagasaki cloud from the observation B-29 \u2014 the photo by Lt. Charles Levy. Photo: US government, public domain<\/figcaption><\/figure>\r\n<p>Bockscar staggered toward Okinawa on fumes, radioing a tower that did not answer; Sweeney ordered every emergency flare in the aircraft fired at once and landed fast and heavy at Yontan, one engine dying of starvation on the rollout. The tanks held less than five minutes of fuel. No aircrew ever delivered a stranger cargo on a thinner margin.<\/p>\r\n<h2 style=\"padding-top:22px\">The Voice of the Crane<\/h2>\r\n<p>Six days later, at noon on 15 August, Japanese radio played a recording no ordinary citizen had ever heard: the voice of the Emperor. Hirohito&rsquo;s rescript never used the word surrender; it noted, in courtly understatement that has entered the language, that the war situation has developed not necessarily to Japan&rsquo;s advantage, and that the enemy has begun to employ a new and most cruel bomb. Japan, he said, must endure the unendurable and suffer what is insufferable. The Second World War was over.<\/p>\r\n<p>The argument about the bombs began at once and has never ended, and the honest version of it belongs in this article. Stimson made the classic defence in 1947: facing an invasion expected to cost over a million American casualties, the bomb was, in his words, the least abhorrent choice, and no man in his position could have failed to use it and afterwards looked his countrymen in the face. The counter-case is just as established: the US Strategic Bombing Survey concluded in 1946 that Japan would likely have surrendered before the end of 1945 without the bombs, without invasion; Eisenhower recalled \u2014 decades later, in a memory historians treat with caution \u2014 having voiced grave misgivings at Potsdam. Tibbets, asked all his life, never wavered: second thoughts? No. He asked that no headstone mark his grave, lest it become a site of protest, and his ashes were scattered over the English Channel. The debate is not this series&rsquo; to settle; the numbers, the names and the shadow on the bank steps are its record.<\/p>\r\n\r\n<div style=\"margin:24px 0\"><div style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden\"><iframe class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" src=\"https:\/\/www.youtube.com\/embed\/HoJ1V9lG0xI\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;border-radius:8px\" allowfullscreen><\/iframe><\/div><p style=\"font-size:13px;color:#777;text-align:center;font-style:italic;margin:6px 0 0\">A Tale of Two Cities (1946): the War Department&rsquo;s own film survey of Hiroshima and Nagasaki, weeks after the strikes.<\/p><\/div>\r\n<p>One thread of this story remains untold. At Trinity, at Los Alamos, inside the most guarded secret in human history, there had been a quiet man taking notes for someone else. Four years later a mushroom cloud rose over the Kazakh steppe, years ahead of every CIA estimate \u2014 and the explanation ran through a Harvard teenager, a chemist-courier with a street map of Santa Fe, and a British physicist who babysat for his colleagues&rsquo; children. The finale of this series: the spies, and the end of the monopoly.<\/p>\r\n\r\n<div style=\"margin:24px 0\"><div style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden\"><iframe class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" src=\"https:\/\/www.youtube.com\/embed\/M8NritTclDY\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;border-radius:8px\" allowfullscreen><\/iframe><\/div><p style=\"font-size:13px;color:#777;text-align:center;font-style:italic;margin:6px 0 0\">The USSBS physical damage survey footage from Hiroshima, March-April 1946 \u2014 the ground truth, unnarrated.<\/p><\/div>\r\n<p><em>Sources: Atomic Heritage Foundation bombing timeline, Truman Library, Manhattan Engineer District report (1946) via Yale Avalon Project, Radiation Effects Research Foundation estimates, Alex Wellerstein (Restricted Data), The New Yorker, Bulletin of the Atomic Scientists, Wikipedia, Richard Rhodes: The Making of the Atomic Bomb.<\/em><\/p>\r\n<!-- SERIES-NAV -->\r\n<div style=\"background:#f0f4ff;border-left:4px solid #5C91FF;padding:16px 20px;margin:32px 0 8px;border-radius:0 8px 8px 0\"><p style=\"margin:0 0 8px;font-weight:600;color:#333\">The Race for the Bomb &mdash; an Afterburner Focus Series<\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/jetflights\/race-for-the-atomic-bomb-series\/\">Series overview: all ten parts<\/a><\/p><p style=\"margin:4px 0\">Previous &mdash; Part 8: <a href=\"https:\/\/migflug.com\/jetflights\/tokyo-firebombing-operation-meetinghouse\/\">History&rsquo;s Deadliest Air Raid Wasn&rsquo;t Nuclear<\/a><\/p><p style=\"margin:4px 0\">Next &mdash; Part 10: <a href=\"https:\/\/migflug.com\/jetflights\/klaus-fuchs-soviet-atomic-spy\/\">The Spy Who Gave Stalin the Bomb<\/a><\/p><\/div>","protected":false},"excerpt":{"rendered":"<p>Part 9 of The Race for the Bomb: the 509th, Tinian, the Enola Gay, Kokura&rsquo;s luck, Nagasaki, and the broadcast that ended the war.<\/p>","protected":false},"author":24,"featured_media":9758450,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"editor_notices":[],"footnotes":""},"categories":[666,664],"tags":[],"class_list":["post-9758929","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-history-and-legends","category-military-aviation"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Hiroshima Atomic Bomb: The Missions of August 1945<\/title>\n<meta name=\"description\" content=\"The Hiroshima atomic bomb mission and Nagasaki three days later: the 509th, Enola Gay, Kokura&rsquo;s luck and the surrender. 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