A U.S. Air Force B-52H Stratofortress conducts a training mission over the Delamere Training Range in Northern Australia during Exercise Pitch Black, Aug. 18, 2016. PB16, a multilateral exercise hosted by Australia from Jul. 29 through Aug. 19, allowed participant nations to exercise deployed units in the tasking, planning and execution of offensive counter air and offensive air support while utilizing one of the largest training airspace areas in the world. (U.S. Air Force photo by Staff Sgt. Sandra Welch)