LOS ALAMOS NATIONAL LABORATORY / SCIENCE PHOTO LIBRARY LOS ALAMOS NATIONAL LABORATORY / SCIENCE PHOTO LIBRARY
Manhattan Project. Detonation of the world's first atomic bomb (code name Trinity) at Los Alamos, USA. The plutonium device was detonated at 5.29 am local time on 16 July 1945, and had an explosive power equivalent to 10,000 tons of TNT. The flash from the explosion could be seen 250 miles away, and the shock wave was felt 50 miles away. The details of the explosion were kept secret until after the destruction of Hiroshima on 6 August 1945. The Army initially reported the explosion as "...an accident at an ammunition dump.".
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