Pictogram showing the relative power of the atomic bomb, 1945
Photograph. Chart illustrating the relative power of the atomic bomb. Official Caption: "Rome 8/20/45. The blasting power of the atomic bomb. The accompanying chart illustrates the tremendous power of the atomic [bomb] the new Allied weapon which was used for the first time on Aug. 5, 1945 [sic] to blast Hiroshima, a Japanese military center on the main island of Honshu. The new bomb possesses more power than 20000 tons of TNT, a destructive force equal to the load carried by 2000 B-29 Superfortress, the powerful four-engined U.S. bombers that have been attacking the Japanese homeland. Photo serviced through U.S.IS, Rome 43299-FF. Approved by appropriate U.S. authority. (D List out). 20 August 1945