Room 641A

Room 641A is a telecommunications interception facility operated by the National Security Agency located in San Francisco. The article documents this facility as part of a comprehensive overview of U.S. and international government mass surveillance programs, including programs like PRISM, ECHELON, and others disclosed publicly starting in 2005 and expanded upon by Edward Snowden's 2013 revelations. The entry covers related legislation, institutions, whistleblowers, and lawsuits challenging these surveillance activities.