11th Wing, and 89th Airlift Wing airman salute the arrival of Air Force One carrying President Barack Obama, April 27, 2012, at Joint Base Andrews, Md. The presidential air transport fleet consists of two specially configured Boeing 747-200B's -- tail numbers 28000 and 29000 -- with the Air Force designation VC-25. When the president is aboard either aircraft, or any Air Force aircraft, the radio call sign is "Air Force One."