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"Little Boy," a uranium-type nuclear bomb, was dropped on Hiroshima on August 6, 1945. "Fat Man," a plutonium-type nuclear bomb, was dropped on Nagasaki on August 9, 1945. On August 15, 1945, Japan announced surrender, signing the Instrument of Surrender on September 2, 1945. Short Answer: August 6 and 9, 1945

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http://en.wikipedia.org/wiki/Atomic_bombings_of_Hiroshima_and_Nagasaki

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16y ago

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