Learn about the history, mission, priorities, and budget of the FBI , the U.S. domestic intelligence and security service and federal law enforcement agency. The FBI has jurisdiction over violations of more than 200 categories of federal crimes and operates 56 field offices and 60 foreign offices. Historical information about the FBI including famous cases and criminals, investigative challenges and milestones, controversies, and the Wall of Honor. To counter terrorism , the FBI 's top investigative priority, we use our investigative and intelligence capabilities to neutralize domestic extremists and help dismantle terrorist networks worldwide. The FBI is an intelligence-driven and threat-focused national security organization with both intelligence and law enforcement responsibilities. It is the principal investigative arm of the U.S ...
