Special Collection Service

Locations of CIA/NSA Special Collection Service (SCS) eavesdropping sites in 2004
Location and status of CIA/NSA Special Collection Service (SCS) eavesdropping sites as of August 13, 2010

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 involved in operations ranging from the Cold War to hunting al-Qaeda after the September 11 attacks.