Originally posted by Truth
"The plane used I believe was Air Force One."
Usually Air Force One is the call sign of one of the "presidential 747s" when the president is on board.
For example when nixon was taken back home after he resigned, the pilot had to call in at 12:00 noon near the end of the flight to reassign the call sign since it was no longer Air Force One since it no longer carried the President of the United States as of noon that day.