. . "The \"Thin Man\" nuclear bomb was a proposed plutonium gun-type nuclear bomb which the United States was developing during the Manhattan Project. Its development was aborted when it was discovered that the spontaneous fission rate of nuclear reactor-bred plutonium was too high for use in a gun-type design."@en . . "yes"@en . . . . . "Thin Man"@en . . . . . "United States"@en . . . . "The \"Thin Man\" nuclear bomb was a proposed plutonium gun-type nuclear bomb which the United States was developing during the Manhattan Project. Its development was aborted when it was discovered that the spontaneous fission rate of nuclear reactor-bred plutonium was too high for use in a gun-type design."@en . . . "Thin Man (nuclear bomb)"@en . . "Plutonium"@en . . "\"Thin Man\" plutonium gun test casings"@en .