The FBI is a national investigative organization that operates throughout the United States. The FBI, or Federal Bureau of Investigation, is headquartered in Quantico, Virginia just outside of Washington, D.C. The “bureau” is an organization that does a number of domestic investigations that spy agencies and local police cannot do. Also, the FBI has resources that aid local law enforcement when needed. Each factor listed below will offer you a glimpse into what the FBI does and how it operates.