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HISTORY World War II Little Boy atomic bomb

Little Boy atomic bomb

Little Boy was the first nuclear bomb used in warfare, devastating Hiroshima with 15 kilotons of TNT

11 Nov 2025

What was the primary reason the Little Boy bomb design was never tested before its use in Hiroshima?

Its gun-type design was considered simple and almost certain to work without testing. There was a shortage of uranium-235 to conduct a test. The bomb was rushed into use due to imminent Japanese surrender.