The CIA, or Central Intelligence Agency, is a civilian foreign intelligence service of the United States government. Its primary function is to gather, process, and analyze national security information from around the world, primarily through human intelligence (HUMINT). Established in 1947, the CIA plays a crucial role in informing U.S. policymakers and conducting covert operations to protect national interests. The agency operates under the jurisdiction of the Director of National Intelligence and is known for its involvement in various global operations, including espionage and counterintelligence. The CIA's work is vital for maintaining national security and understanding international threats, making it a key player in U.S. defense strategy.