The National Security Agency (NSA) is a U.S. government agency responsible for signals intelligence and information assurance. It plays a crucial role in monitoring and collecting foreign communications and data to protect national security. The NSA works closely with other intelligence agencies, such as the Central Intelligence Agency (CIA) and the Federal Bureau of Investigation (FBI). Founded in 1952, the NSA operates under the Department of Defense and is headquartered in Fort Meade, Maryland. Its primary mission includes safeguarding U.S. government communications and ensuring the security of national information systems. The agency also engages in cybersecurity efforts to protect against cyber threats.