Overview#Foreign Intelligence Surveillance Court is a United States Judiciary established in 1978 when United States Congress enacted the Foreign Intelligence Surveillance Act (FISA)
Foreign Intelligence Surveillance Court is to oversee requests for surveillance warrants against foreign spies inside the United States by federal Law Enforcement Agency and Intelligence Agencies. Such requests are made most often by the National Security Agency (NSA) and the Federal Bureau of Investigation (FBI). Congress created FISA and its court as a result of the recommendations by the U.S. Senate's Church Committee. Its powers have evolved to the point that it has been called "almost a parallel United States Supreme Court."