Natan Sharansky to intense political pressure from Ronald Reagan. Sharansky and three low-level Western spies (Czech citizen Jaroslav Javorský and West German citizens Wolf-Georg Frohn and Dietrich Nistroy) were exchanged for Czech spies Karl Koecher and Hana Koecher held in the United States, Soviet spy Yevgeni Zemlyakov, Polish spy Marian Zacharski and East German spy Detlef Scharfenorth (the latter three held in West Germany). The exchange took place on the Glienicke Bridge between East and West Berlin, which had been used before for this purpose. Sharansky immediately immigrated to Israel, adopting the Hebrew name "Natan" and eventually simplifying his surname to Sharansky.
Predictions of the dissolution of the Soviet Union Soviet authorities were skeptical. Natan Sharansky explained that "in 1984 KGB officials, on coming to me in prison" when Amalrik's prediction was mentioned, "laughed at this prediction. Amalrik is long dead, they said, but we are still very much present." Historian Marian Kamil Dziewanowski "gave a lecture titled 'Death of the Soviet Regime' at the Russian Research Center at Harvard University. The same lecture was delivered at Cambridge University in England in 1971 and 1979. The text of the lecture (titled 'Death of the Soviet Regime: a Study in American Sovietology, by a Historian') was published in "Studies in Soviet