Example image of eyePlorer eyePlorer map for 'Little Boy': 393d Bomb Squadron B-29 Superfortress Code name Colonel (United States) Enola Gay Hiroshima Nuclear weapon Paul Tibbets United States Army Air Forces Fat Man Nagasaki Manhattan Project World War II Nuclear fission Uranium-235 Atomic bombings of Hiroshima and Nagasaki Nuclear explosion Trinity (nuclear test) Uranium Critical mass Gun-type fission weapon Nuclear chain reaction Nuclear weapon design Nuclear weapons testing Hanford Site Ground out Red Beard (nuclear weapon) Classified information Tinian USS Indianapolis (CA-35) Pounds per square inch X-ray Ground zero Fragmentation (weaponry) Shock wave Speed of sound Nuclear fallout Air burst Stratosphere Gamma ray Neutron radiation In utero Isotope separation Oak Ridge, Tennessee Los Alamos National Laboratory Thin Man nuclear bomb Francis Birch (geophysicist) Edgar Sengier Shinkolobwe Union Minière du Haut Katanga