37. KGB -Russia's Secret Service in the West

Soviet Intelligence has a huge presence in every Western country; some four out of every ten Russian diplomats are KGB officers. They wage war by clandestine means. Their methods - disinformation, sexual entrapment, blackmail and the use of' illegals', old-fashioned spies. Tom Mangold investigates how serious is its threat, and how effective its contribution to ultimate Soviet ambitions.