A U.S. Air Force F-16 aircraft takes off during exercise PITCH BLACK 16 (PB16) at Royal Australian Air Force (RAAF) Base Darwin, Australia, Aug. 1, 2016. PB16 allows 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. The exercise is scheduled from July 29 to Aug.19, 2016. (Australian Defence Force photo by Cpl. Casey Gaul)