Nuclear fission the Manhattan Project during World War II (September 1, 1939 – September 2, 1945) carried out most of the early scientific work on fission chain reactions, culminating in the three events involving fission bombs that occurred during the war. The first fission bomb, codenamed "The Gadget", was detonated during the Trinity Test in the desert of New Mexico on July 16, 1945. Two other fission bombs, codenamed "Little Boy" and "Fat Man", were used in combat against the Japanese cities of Hiroshima and Nagasaki in on August 6 and 9, 1945 respectively. Even the first fission bombs were thousands of
Mark 12 nuclear bomb film, where the plot included an Israeli copy of the Mark-12 being lost by accident in 1973 during the Yom Kippur War in southern Syria near the Golan Heights, and then recovered by a terrorist organization. Mark 12 nuclear bomb The Mark-12 nuclear bomb was a lightweight nuclear bomb designed and manufactured by the United States which was built starting in 1954 and which saw service from then until 1962. The Mark-12 was notable for being significantly smaller in both size and weight compared to prior implosion-type nuclear weapons. For example, the overall diameter was only , compared to the