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atomic bomb or A-bomb, weapon deriving its explosive force from the release of nuclear energy through the fission (splitting) of heavy atomic nuclei.The first atomic bomb was produced at the Los Alamos, N.Mex., laboratory and successfully tested on July 16, 1945.tomic bombs were subsequently developed by the USSR (1949; now Russia), Great Britain (1952), France (1960), and China (1964). A number of other nations, particularly India, Pakistan, Israel, and North Korea now have atomic bombs or the capability to produce them; South Africa formerly possessed a small arsenal.
The Megaton atomic bomb (called Atom by the The Church of the Children of Atom and also the Apostles of the Holy Light) is the undetonated C-23 Megaton nuclear weapon sitting at the center of Megaton. The fate of the bomb and the whole settlement is determined in one of the adventures of the Lone Wanderer.he founders of Megaton discovered the bomb, and a group of people calling themselves the Children of the Atom started worshiping it. Both groups teamed up, and, using airplane parts from a demolished airport, built Megaton's walls and structures and settled in the area.