A South Korean air force F-15 maneuvers toward a refueling boom as Senior Airman Charlton Hampton, a 909th Air Refueling Squadron KC-135 Stratotanker boom operator, provides positional feedback Sept. 12, 2016, over the Pacific Ocean. Hampton trained with South Korean F-15s as part of a night time in-flight refueling exercise to help prepare for aerial operations in an austere environment. (U.S. Air Force photo/Senior Airman Peter Reft)