The First Atomic Bomb in Combat Was Dropped on Hiroshima at 8:15 a.m. on 6 August 1945 and Killed Approximately 140,000 People by the End of the Year
The American B-29 Enola Gay dropped a uranium-235 fission bomb on Hiroshima at 8:15 a.m. on 6 August 1945. The bomb detonated approximately 580 metres above the city centre and killed approximately 70,000 people instantly. By the end of 1945 the cumulative death toll from blast, burns, and acute radiation sickness had reached approximately 140,000. Japan surrendered nine days later.
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