Hiroshima, Bombing of

Hiroshima, Bombing of (Japan) At 8:16 a.m., 6 August 1945, Colonel Paul Tibbets’s B-29 Enola Gay detonated the first atomic bomb used in warfare. The explosion equaled 20,000 tons of TNT, destroyed four square miles, killed 66,000–78,000, injured at least 80,000, and exposed 300,000 people to radiation.