A KC-135 Stratotanker assigned to the 92nd Air Refueling Wing, Fairchild Air Force Base, Wash., taxis down the runway during Red Flag 15-3 at Nellis AFB, Nev., July 21, 2015. The KC-135’s role in Red Flag is to refuel other aircraft in mid-air thus extending their flight time in the mission area. (U.S. Air Force photo by Senior Airman Thomas Spangler)