A KC-135 Stratotanker assigned to the 22nd Air Refueling Wing sits on the flightline before takeoff, Aug. 3, 2017, at McConnell Air Force Base, Kan. The KC-135 Stratotanker provides the core aerial refueling capability for the United States Air Force and has excelled in this role for 60 years. (U.S. Air Force photo by Tech. Sgt. Abigail Klein)