Pacific Missile Range security forces personnel survey the perimeter as they search for suspects during an active shooter exercise conducted in Barking Sands, Hawaii, as part of the annual Citadel Pacific exercise, Aug. 30, 2016. Citadel Pacific's objective is to enhance the training and readiness of security forces and Navy first-responders for specific threats to installations and personnel. Navy photo by Petty Officer 2nd Class Omar-Kareem Powell