Andrews Field is the airfield portion of Joint Base Andrews which is under the jurisdiction of the United States Air Force. In 2009, Andrews Air Force Base merged with Naval Air Facility Washington to form Joint Base Andrews. Andrews is the home base of two Boeing VC-25A aircraft with the call sign Air Force One when the president is on board, that serve the President of the United States.The host unit at Andrews is the 11th Wing, assigned to the Air Force District of Washington.