What is the purpose of the US National Security Agency NSA?

The primary purpose of the U.S. National Security Agency (NSA) is to collect, analyze, and disseminate foreign signals intelligence (SIGINT) to support national security and foreign policy objectives. The NSA also plays a critical role in protecting U.S. government communications and information systems from cyber threats. Additionally, it contributes to cybersecurity efforts and works to ensure the integrity of national defense. Overall, the NSA aims to safeguard the United States against various threats while supporting intelligence operations.