180129-N-SX614-037 KEY WEST, Florida (Jan. 29, 2018) Security forces at Naval Air Station Key West respond to an active shooter drill as part of the Operation Solid Curtain Citadel Shield exercise at NAS Key West’s Mole Pier. Solid Curtain Citadel Shield is an annual Navy wide anti-terrorism force protection exercise designed to train and assesses Navy security forces response to threats on installations and units. NAS Key West is a state-of-the-art facility for air-to-air combat fighter aircraft of all military services and provides world-class pierside support to U.S. and foreign naval vessels. (U.S. Navy Photo by Mass Communication Specialist 2nd Class Cody R. Babin/Released)