During the Cold War, the United States was forced to establish means of massive long-range attack in response to Soviet Union advancements in weaponry. These defenses detected and tracked manned bomber aircraft, hostile submarines and missiles launched from the other side of the world. This book shows how these defenses evolved from fledgling stop-gap measures into a complex fabric of interconnected combinations of high-tech equipment over 40 years. Maps illustrate the extent of the geographic coverage required for these warning and response systems and charts display the time frames and vast numbers of both people and equipment that made up these forces.