Boeing built four 757-200 aircraft, designated C-32A, to replace the Air Force's aging fleet of VC-137 executive transports. The C-32As carry the U.S. vice president, members of the U.S. cabinet and Congress, and other government officials traveling on government business. The first two C-32s entered operational service in 1998, the final two in early 1999. The fleet is based at Andrews Air Force Base, Maryland and is operated by the 89th Airlift Wing.