Air Force One: 'The granddaddy of corporate jets'
13 March 2012 Last updated at 13:42 GMT
The UK's prime minister will be the first foreign dignitary to fly on Air Force One with President Barack Obama.
David Cameron will board the president's jet when the two leaders fly to Ohio to watch a basketball match.
The plane has been described as the White House with wings.
The BBC asked aviation expert Chris Yates to describe what facilities the plane has on board.