Spy swap: Cold War rerun, but with a difference
 

Story,
The spy exchange unfolding in Moscow, New York and points between evokes a bygone era when cold war teetered on the verge of hot, superpowers sniffed out each other's deadliest secrets, and the swaps even had a ringmaster in a dapper German communist.

http://www.aolnews.com/story/spy-swa...with-a/1155487

Spy exchanges are far more common than you think, it would seem. It is just that usually they are conducted discretely nowadays.

This post was not,
 

intended too be controversial,only a thinkable in history aspect,so too refer to your commentary "Spy exchanges are far more common than you think" all I can say are this
is not extremely negotiate at all,I now for sure at this happen sometimes frequent.