U.S. Air Force Lt. Col. Mark Hole, pilot, and Captain Thomas Bryceland, co-pilot, 185th Air Refueling Squadron, prepare for takeoff in the KC-135 Stratotanker for the last time during the last training mission of the 185 ARS on Tinker Air Force base, June 30, 2015 at Tinker Air Force base, Okla. The 185th will be transitioning to Air Force Special Operations Command effective July 1, 2015. (U.S. Air National Guard photo by Tech Sgt. Caroline Essex/Released)

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Photo by: Tech Sgt. Caroline EssexReleased |  VIRIN: 150630-Z-YU985-118.JPG