There's a book called Brainwash: The Secret History of Mind Control by Dominic Streatfeild that goes into this topic well if people are interested.
(And by well I mean takes a fairly sceptical view that they ever really got anywhere, and generally makes the case that the CIA ended up so desperate to counter perceived Russian abilities that they really stopped asking if any of the people they were hiring in this area were either total con-men or just completely nuts.)
(And by well I mean takes a fairly sceptical view that they ever really got anywhere, and generally makes the case that the CIA ended up so desperate to counter perceived Russian abilities that they really stopped asking if any of the people they were hiring in this area were either total con-men or just completely nuts.)