U.S. Air Force Senior Master Sgt. Phillip Costine, a 63rd Air Refueling Squadron evaluator boom operator refuels a B-52 Stratofortress, Nov. 4, 2019. The KC-135 crew from MacDill Air Force Base, Fla., delivered air refueling support to bolster the global strike capabilities of the B-52 assigned to Barksdale AFB, La. (U.S. Air Force photo by Airman 1st Class Shannon Bowman)