From Canadian Power Wiki
The Boeing C-32 is a military passenger transportation version of the Boeing 757 for the United States Air Force. The C-32 provides transportation for United States leaders to locations around the world. The primary users are the Vice President of the United States, using the distinctive call sign "Air Force Two", the First Lady and the Secretary of State. On rare occasions, other members of the U.S. Cabinet and Congressional leaders have been authorized to fly aboard the C-32 for various missions. The C-32, since its debut, has also served as Air Force One in place of the larger VC-25A to airports that cannot support the Boeing 747-based jumbo jet.