The United States intelligence agency is a well-known term that refers to the government security organizations responsible for gathering and analyzing information that could potentially affect the country's national security. While the phrase is familiar and frequently used, there are several synonyms that can easily be used in its place. Such synonyms include the Federal Bureau of Investigation (FBI), the Central Intelligence Agency (CIA), the National Security Agency (NSA), the Defense Intelligence Agency (DIA), and the Office of Naval Intelligence (ONI). These organizations play a vital role in protecting the United States and its interests both within its borders and around the world.