A KC-135 Stratotanker piloted by an 18th Air Refueling Squadron aircrew is refueled by another KC-135 from McConnell Aug. 5, 2017. 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)