Federal Bureau of Investigation

The Federal Bureau of Investigation (FBI) is the primary federal investigative law enforcement agency in the United States. Based in the USA, the FBI handles domestic federal law enforcement, international counter-intelligence investigations, and provides critical leadership and investigative assistance to other agencies. With an annual budget of over $8.1 billion and over 40,000 employees, including more than 14,000 special agents, the FBI is widely regarded as the most effective agency of its kind in the world.