This is a print on demand edition of a hard to find publication. This is the second of two vol. on the history of strategic air and ballistic missile defense from 1945 to 1972. It covers 1955¿1972, and is organized into five interrelated chapters. Chapter I provides a comparison of U.S. and Soviet strategies, Chapters II and III deal with U.S. strategy and Soviet strategy, while Chapters IV and V cover U.S. systems and Soviet systems. The Executive Summary has three major groupings: one, to reflect the contextual setting of decision-making, circa 1955; the second, to highlight strategic air defense policy comparisons and contrasts, 1955¿1972; and a third, to present judgments and conclusions about the results of the play of factors and perceptions which molded air defense decisions during these years. Illustrations.