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As Vice-president, Harry Truman had not known about the development of the atomic bomb. On the day he assumed the Presidency at the death of Franklin D. Roosevelt, Secretary of War Henry L. Stimson had spoken to him briefly and told him that the United States ....

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.... the Manhattan Project since 1941, there was never any question in Roosevelt’s mind but the bomb would be used when ready. On Truman’s orders, the B-29 Enola Gay piloted by U.S. Army Force Col. Paul W. Tibbets dropped the first atomic bomb on Hiroshima. The date was August 6, 1945. Tibbets had named the plane after his mother the night before the attack. The Bomb was named Little Boy (Dark Blue in picture), exploded approximately 1,800 feet over Hiroshima, Japan with a force equal to 13,000 tons of TNT. Immediate deaths were between 70,000 to 130,000. Fat Boy was the second nuclear weapon used in warfare. Dropped on Nagasaki, Japan, ....