WWII: height of nuclear bomb drops and detonations 1945

At 08:15am, on August 6, 1945, Colonel Paul Tibbets flew his B-29 bomber named Enola Gay over Hiroshima, and at a height of 31,000 feet (9.4km) he dropped the first nuclear weapon ever used in warfare. The bomb resulted in the instant death of some 70,000 people, and up to 70,000 more by the end of the year, but it did not achieve its goal of forcing Japan into surrender. Three days later, on the morning August 9, 1945, Major Charles W. Sweeney flew his B-29 bomber named Bockscar towards his original target at Kokura, however, delays in the rendezvous with other aircraft on reconnaissance and photographing missions allowed time for clouds and smoke from nearby firebombing missions to gather, which impeded visibility. Therefore, as fuel began to run out and the likelihood of Japanese defenses arriving grew, the mission changed its target to Nagasaki. At 11:01am, at a height of 29,000 feet (8.8km), the second and last nuclear weapon ever used in warfare was dropped, instantly killing around 40,000 people, and up to 100,000 more by the year's end.

在1945年8月6日的上午8点15分，保罗·蒂贝茨上校驾驶其名为‘恩ola Gay’的B-29轰炸机飞越广岛，在31,000英尺（9.4公里）的高度投下了人类历史上首次用于战争的核武器。该炸弹导致约70,000人立即死亡，截至年底，死亡人数增至70,000人以上，但并未实现迫使日本投降的目标。三天后，即1945年8月9日清晨，查尔斯·W·斯温尼上校驾驶其名为‘Bockscar’的B-29轰炸机飞向原定目标 Kokura，然而，与执行侦察和摄影任务的其它飞机会合的延误，使得附近的火攻任务产生的云雾和烟雾聚集，影响了能见度。因此，随着燃料开始耗尽，以及日本防御部队可能到来的可能性增加，任务将目标改为长崎。在上午11点01分，在29,000英尺（8.8公里）的高度，投下了人类历史上第二次也是最后一次用于战争的核武器，立即造成约40,000人死亡，到年底，死亡人数增至10万人以上。