For nearly half a century, Paul Nitze was one of the chief architects of U.S. policy toward the Soviet Union. From 1950 to 1953, Nitze served as director of the State Department's Policy Planning staff, and from 1961 to 1963 he was assistant defense secretary. As his interview reveals, Nitze held key positions during the period after World War II when the United States emerged as a superpower and Cold War strategic policies were being debated and defined. His classified 1950 report, National Security Memorandum 68, remains a seminal document: it was initially designed to persuade President Harry S. Truman that an increasingly menacing world required major increases in spending on defense and foreign military assistance. He describes the American involvement in the Korean War and Berlin Blockade.