The President may also call up members and units of the Army National Guard, in its status as the militia of the several states, to repel invasion, suppress rebellion, or enforce federal laws. The Army National Guard of the United States is one of two organizations administered by the National Guard Bureau, the other being the Air National Guard of the United States. The Director of the Army National Guard is the head of the organization, and reports to the Chief of the National Guard Bureau. Because the Army National Guard is both the militia of the several states and a federal reserve component of the Army, neither the Chief of the National Guard Bureau nor the Director of the Army National Guard "commands" it. This function is performed in each state or territory by the State Adjutant General, and in the District of Columbia by the Commanding General of the District of Columbia National Guard when a unit is in its militia status. The Chief of the National Guard Bureau and the Director of the Army National Guard serve as the channel of communications between the Department of the Army and the Army National Guard in each state and territory, and administer federal programs, policies, and resources for the National Guard.