The Boeing C-32 is a military passenger transport of the United States Air Force, providing 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 accommodate the Boeing 747-based "jumbo" jet.