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RAF Menwith Hill is a British military base with connections to the global ECHELON spy network. The site contains an extensive satellite ground station and is a communications intercept and missile warning site and has been described as the largest electronic monitoring station in the world. The site acts as a ground station for a number of satellites operated by the US National Reconnaissance Office, on behalf of the US National Security Agency, with antennae contained in a large number of highly distinctive white radomes, and is alleged to be an element of the ECHELON system. ECHELON was reportedly created to monitor the military and diplomatic communications of the Soviet Union and its Eastern Bloc allies during the Cold War in the early 1960s, but since the end of the Cold War it is believed to search also for hints of terrorist plots, drug dealers’ plans, and political and diplomatic intelligence. It has also been involved in reports of commercial espionage and is believed to filter all telephone and radio communications in the nations which host it – an extreme violation of privacy.