The doctrine assumes that each side has enough nuclear weaponry to destroy the other side and that either side, if attacked for any reason by the other, would retaliate with equal or greater force. The expected result is an immediate escalation resulting in both combatants' total and assured destruction.
(...)
Whether MAD was the officially accepted doctrine of the United States military during the Cold War is largely a matter of interpretation. The term MAD was not coined by the military but was, however, based on the policy of "Assured Destruction" advocated by U.S. Secretary of Defense Robert McNamara during the 1960s. The United States Air Force, for example, has retrospectively contended that it never advocated MAD and that this form of deterrence was seen as one of numerous options in U.S. nuclear policy. Former officers have emphasized that they never felt as limited by the logic of MAD (and were prepared to use nuclear weapons in smaller scale situations than "Assured Destruction" allowed), and did not deliberately target civilian cities (though they acknowledge that the result of a "purely military" attack would certainly devastate the cities as well). MAD was implied in several U.S. policies and used in the political rhetoric of leaders in both the U.S. and the USSR during many periods of the Cold War.
Or by nuclear bombs, do they just mean cosmic impacts giving off radiation?
