[[Image:Nevada test site.jpg|thumb|right|The Nevada Nuclear Test Site where the first nuclear weapons were tested]]A '''nuclear weapon''' is
a [[bomb]] which derives its destructive force from an uncontrolled nuclear detonation, releasing massive amounts of thermal, and (as a byproduct), radioactive energy. Conventional weapons use a chemical reaction as the source of their explosive force.
Nuclear weapons usually have dramatically more destructive power than conventional weapon, where the power of a nuclear weapon is measured in kilotons. One kiloton has the equivalent explosive force of 1,000 tons of [[TNT]].