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The Enduring Stockpile  •Delivery Systems  

Los Alamos, New Mexico

Los Alamos, New MexicoKnown as "the hill," Los Alamos produced two bombs. One, nicknamed Little Boy, was a gun-type weapon that used U-235. A slug of U-235 would be projected down a gun barrel into the center of another piece of U-235. When combined, a nuclear explosion would occur.

The second bomb, Fat Man, used implosion to detonate plutonium. Here, explosives would surround the plutonium ball. When detonated, they would compress the plutonium, causing a nuclear explosion.

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National Atomic Museum.