Question: What defense contractor operated a highly classified fleet of passenger aircraft to transport United States Air Force military and contractor employees?
Sentence (from "Keyway Air Transport"): From 1992 onwards, after having been modified for military service by Raytheon, the aircraft was used by the United States Air Force as an airborne command post for the United States Central Command and later on was reported as being used by the Air Force Special Operations Command, before being put in storage at the 309th Aerospace Maintenance and Regeneration Group located on Davis–Monthan Air Force Base in 2002.
Relevant evidence: No