"Today, it would be easy for adversaries to introduce and detonate a nuclear explosive clandestinely in the United States. In or near a city, such an explosion would kill a great many people. Any nuclear explosion by an adversary against the United States would have repercussions that could profoundly impact the nation politically, economically, and even culturally in a variety of ways. Events would be set in motion that could affect world history, perhaps in catastrophic ways." It is a central thesis of this report that a clandestine nuclear attack and the defense against it should be treated as an emerging aspect of strategic warfare. U.S. DEFENSE PLAN AGAINST NUCLEAR ATTACKS provides information relating to: · DoD"s main operational roles and missions: Discussion and recommendations · Clandestine attack scenarios vs. protection architectures · "Imperfect defenses" and improvements to intelligence capabilities · Operational changes and increased radiation detection...