A soldier checks for firing clearance before engaging an unmanned aerial vehicle target with an AN/TWQ-1 Avenger air defense system during Rim of the Pacific exercise at Pacific Missile Range Facility Barking Sands, Hawaii, July 24, 2018. PMRF is the world’s largest instrumental multi-environmental range capable of supported surface, subsurface, air and space operations simultaneously. Army photo by Sgt. 1st Class Claudio Tejada