The mission of the VC-25 aircraft -- Air Force One -- is to provide air transport for the president of the United States.
When the president is aboard either aircraft, or any Air Force aircraft, the radio call sign is "Air Force One." Accommodations for the president include an executive suite consisting of a stateroom (with dressing room, lavatory and shower) and the president's office. A conference/dining room is also available for the president, his family and staff. Other separate accommodations are provided for guests, senior staff, Secret Service and security personnel and the news media. (U.S. Air Force photo by Jeremy Mashek)