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Trinity nuclear test
16 July 1945 · Trinity Site, New Mexico
On 16 July 1945 at 5:29 a.m. Mountain War Time the first nuclear weapon was detonated at the Trinity Site in the Jornada del Muerto desert about 35 miles southeast of Socorro, New Mexico. The device, 'Gadget', was an implosion-type plutonium bomb of the same design as the Fat Man bomb used at Nagasaki. A 2021 re-analysis puts the yield at about 24.8 kilotons of TNT against the original official estimate of 21. The Manhattan Project was directed by Brig. Gen. Leslie R. Groves Jr.; J. Robert Oppenheimer directed the Los Alamos Laboratory. President Truman learned of the success at the Potsdam Conference.
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