Hiroshima, a Japanese city, situated some 8M km. (500 mi.) from Tokyo, on which the first operational atomic bomb was dropped at 0815 on 6 August 1945. Nicknamed 'Little Boy’—a reference to Roosevelt—the bomb was 3 m. (9 ft. 9 in.) long, used uranium 235, had the power of 12.5 kilotons of TNT, and weighed 3,600 kg. (nearly 8,000 lb.)
"Little Boy" was the codename for the atomic bomb dropped on Hiroshima on August 6, 1945 by the Boeing B-29 Superfortress Enola Gay, piloted by Colonel Paul Tibbets of the 393rd Bombardment Squadron, Heavy, of the United States Army Air Forces. It was the first atomic bomb to be used as a weapon.
About 140,000 people were killed or died within months when the American B-29
"Enola Gay" bombed Hiroshima on Aug. 6, 1945.
A mushroom cloud billows about one hour after an atomic bomb was detonated above Hiroshima, Japan on Aug. 6, 1945