Major Events Concerning Nuclear Weapons By hdudley1 Aug 13, 1942 The Manhattan Project is established Oak Ridge National Lab and Las Alamos National Lab Aug 6, 1945 "Little Boy" Dropped on Hiroshima, Japan Dropped by United States on Heroshima. Aug 9, 1945 "Fat Man" Dropped on Nagasaki, Japan Jul 6, 1968 Nuclear Non-Proliferation Treaty Open For Signatures
