Ever since the two adversaries in the Cold War, U.S.A. and U.S.S.R., realized that their nuclear arsenals were sufficient to do disastrous damage to both countries at short notice, the leaders and military commanders have thought about the possibility of a nuclear war starting without their intention or as a result of a false alarm. Increasingly elaborate accessories have been incorporated in nuclear weapons and their delivery systems to minimize the risk of unauthorized or accidenta launch or detonation. A most innovative action was the establishment of the "hot line" between Washington and Moscow in 1963 to reduce the risk of misunderstanding between the supreme commanders.
