It US documentary aired on PBS in 1987 and is as good as anything on the tape (must see). Moyers is a very respected TV journalist who also worked for Lyndon B. Johnson and has a very professional approach. He interviews many different people involved with the CIA and other government agencies. His documentary gives quite an overview of what has actually happened in the last 50 years regarding the CIA and the cold war (including Iran, Guatamala, Cuba, Viet Nam and Chile). He features such people as Ralph McGeehee and Phil Retinger (both former CIA agents), Rear Admiral Gene La Rocque (Ret. U.S.N.), Theodore Bissell (active in the CIA at the time), Sen. Frank Church and many others. Moyers is so very credible. The full video "The Secret Government" is 90 minutes - this segment is edited by Frank Dorrel to 20 minutes.
