Powers had been sentenced to 10 years’ confinement in the USSR but, amidst concerns that he might reveal any remaining secrets to the Soviet authorities, the U.S. government agreed to exchange Powers and imprisoned student Frederic Pryor in return for Soviet Colonel Rudolf Abel.

Attended by the “Big Three” Allied leaders, the conference saw United States President Franklin D. Roosevelt, British Prime Minister Winston Churchill and Soviet Premier Joseph Stalin meet to discuss the government of post-war Europe.