Air Force One

"Air Force One is the official air traffic control call sign of any United States Air Force aircraft carrying the President of the United States. Since 1990, the presidential fleet has consisted of two specifically configured, highly customized Boeing 747-200B series aircraft tail codes Special Air Mission (SAM) ""28000"" and SAM ""29000"" with Air Force designation ""VC-25A"". While these aircraft have the call sign ""Air Force One"" only while the president is on board, the term is colloquially used to describe either of the two aircraft normally used and maintained by the U.S. Air Force solely for the president, as well as any additional Air Force aircraft used by the president, including a C-37A Gulfstream. Air Force One is a prominent symbol of the American presidency and its power. The aircraft are among the most famous and most photographed in the world."