Master-at-Arms 3rd Class Anthony Ford, from St. Mary’s, Ga., assigned to Naval Air Station Whidbey Island security forces, clears a hallway in Navy Hospital Oak Harbor during Exercise Solid Curtain-Citadel Shield 2015. 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.