Senior Master Sgt. Samuel Rock, an Air Force Reserve volunteer from Seymour Johnson Air Force Base, N.C., works with Senior Airman Quilan Johansen, of the 412th Aircraft Maintenance Squadron, on an F-16 Fighting Falcon radar waveguide pressurization. Reservists are augmenting F-16 support for KC-46 Pegasus testing at Edwards Air Force Base, Calif. (U.S. Air force photo/Kenji Thuloweit)