United States Foreign Intelligence Surveillance Court

The United States Foreign Intelligence Surveillance Court (FISC; also called the FISA Court) is a U.S. federal court established under the Foreign Intelligence Surveillance Act of 1978 (FISA) to oversee requests for surveillance warrants against foreign spies inside the United States by federal law enforcement and intelligence agencies. FISA was created by the U.S. Congress based on the recommendations of the Senate's Church Committee, which was convened in 1975 to investigate illicit activities and civil rights abuses by the federal intelligence community.

Source: Wikipedia — United States Foreign Intelligence Surveillance Court (CC BY-SA 4.0)