c) NSA

The National Security Agency (NSA) is responsible for protecting U.S. government communications and collecting foreign signals intelligence. Founded in 1952, the NSA plays a critical role in national defense and cybersecurity. Its mission includes the monitoring and decoding of foreign communications, as well as safeguarding U.S. communication channels and information systems against espionage and cyber attacks. The NSA’s operations are highly classified, making it one of the most secretive organizations within the U.S. government. Its capabilities in code-breaking and electronic surveillance have made it a key player in intelligence and counterintelligence efforts, both domestically and internationally.