160205-N-ZA795-015 ANNAPOLIS, Md. (Feb. 5, 2016) Security forces from Naval Support Facility Annapolis neutralize a simulated "active shooter" in the Brigade Sports Complex during a drill at the U.S. Naval Academy during the annual exercise Solid Curtain-Citadel Shield 2016. Solid Curtain-Citadel Shield is an annual exercise that assesses the readiness of Navy security personnel to respond to threats located on naval installations and individual units. (U.S. Navy photo by Mass Communication Specialist 1st Class Pedro A. Rodriguez/Released)