The Special Collection Service (SCS) is a highly classified joint U.S. Central Intelligence Agency-National Security Agency program charged with inserting eavesdropping equipment in difficult-to-reach places, such as foreign embassies, communications centers, and foreign government installations. Established in the late 1970s and headquartered in Beltsville, Maryland, the SCS has been described as the United States' "Mission Impossible force". The SCS has been involved in operations ranging from the Cold War to the Global War on Terrorism.