How was it put together? Who decides what targets to hit and why? When and where would it be put into action? Using recently declassified documents and interviews with government officials and military planners, the authors have pieced together an absorbing history of the Pentagon's most secret war plan.

They have unraveled the huge, hidden network of satellites, computers, radar, and microwave links that gathers intelligence on the Soviet Union and would help to execute the S.I.O.P. in time of war. They compare Washington's rhetoric to the cold reality of the actual war plans on the...