Air Refueling
A B-52 Stratofortress from Barksdale Air Force Base, La., is refueled by a KC-135 Stratotanker from McConnell Air Force Base, Kan., during an air refueling training exercise, Nov. 1, 2014. The KC-135 was operated by an aircrew made up of Air Force Reservists from the 931st Air Refueling Group at McConnell. The KC-135 serves as the core of the Air Force’s air refueling fleet and has performing in this role for more than 50 years. (U.S. Air Force photos by Senior Master Sgt. Ray Lewis)