In battle, in the forest, at the precipice in the mountains,On the dark great sea, in the midst of javelins and arrows,In sleep, in confusion, in the depths of shame,The good deeds a man has done before defend him.Now I am become Death, the destroyer of worlds. (Bhagavad Gita) - J. Robert OppenheimerA nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission or a combination of fission and fusion reactions, producing a nuclear explosion. Both bomb types release large quantities of energy from relatively small amounts of matter.