Evening refueling
A U.S. Navy E-6B Mercury aircraft approaches the refueling boom of a KC-135 Stratotanker assigned to McConnell Air Force Base, Kan., during an evening air refueling mission, Aug. 11, 2014. The KC-135 was operated by an aircrew made up of Air Force Reservists from the 931st Air Refueling Group at McConnell AFB. (U.S. Air Force photo by Senior Master Sgt. Ray Lewis)