US Air Force/Paul Shirk Take a look at these interesting images of two B-52 bombers undergoing maintenance at Tinker Air Force Base in Oklahoma. "Wise Guy" and "Ghost Rider," as they're called, are the only B-52s to be resurrected from the Air Force's "boneyard." As reported in detail in the last few months, only two US Air Force B-52 Stratofortress bombers have been restored out of the "Boneyard," at the 309th AMARG (Aerospace Maintenance and Regeneration Group) at Davis-Monthan AFB, Arizona, to be returned to front-line service: "Ghost Rider," tail number 61-0007, and "Wise Guy," tail number 60-0034.