The United States Capitol Police (USCP) is a federal law enforcement agency charged with protecting the United States Congress within the District of Columbia and throughout the United States and its territories. The USCP are one of the few federal police forces responsible to the legislative branch of the U.S. government. The United States Capitol Police has the primary responsibility for protecting life and property; preventing, detecting, and investigating criminal acts; and enforcing traffic regulations throughout a large complex of congressional buildings, parks, and thoroughfares. The Capitol Police has exclusive jurisdiction within the United States Capitol Grounds and has concurrent jurisdiction with other law enforcement agencies, including the United States Park Police and the Metropolitan Police Department of the District of Columbia, in an area of approximately 200 blocks around the complex. Officers also have jurisdiction throughout the District of Columbia to take enforcement action when they observe or are made aware of crimes of violence while on official duties. Additionally, they are charged with the protection of members of Congress, officers of Congress, and their families throughout the entire United States, its territories and possessions, and the District of Columbia. While performing protective functions the Capitol Police have jurisdiction throughout the entire United States.