Frederic Pryor was the American student imprisoned in East Berlin for espionage in 1961 and released six months later when U-2 pilot Francis Gary Powers was exchanged for the Soviet spy Rudolf Abel. Their story was told in the film "Bridge of Spies."
On May 1, 1960, Soviets shot down U-2 pilot Francis Gary Powers over Sverdlovsk. He spent 21 months in a Russian prison.
In 1962, Powers was exchanged for Soviet intelligence officer Col. Rudolf Abel. Abel had been arrested in New York in 1957.