Deportation
The fate of Bukovsky and other political prisoners in the Soviet Union, repeatedly brought to attention by Western human rights groups and diplomats, was a cause of embarrassment and irritation for the Soviet authorities.
In December 1976, in his eleventh year of psychiatric hospitals and prison camps, Bukovsky was exchanged by the Soviet government for the imprisoned Chilean Communist leader Luis Corvalán at Zürich airport and, after a short stay in the Netherlands, took up refuge in Great Britain where later moved from London to Cambridge for his studies in biology. In his autobiographical book To Build a Castle, Bukovsky describes how he was brought to Switzerland handcuffed. This biography is available online at several sites.
Read more about this topic: Vladimir Bukovsky