(PD) Photo: Berlyn Brixner 4 Mt,Trinity test of first atomic bomb, July 15, 1945, 0.016 seconds after detonation. Fireball was about 200 metres wide.
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(PD) Photo: U.S. Government 15 Mt, Fireball of Castle Bravo hydrogen bomb test, March 1, 1954
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(PD) Photo: U.S. Government 1Mt, Arkansas test, parachuted air drop from B52 aircraft, May 2, 1962
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