150210-N-IM823-063 FALLON, Nev. (Feb. 10, 2015) Aviation Boatswain's Mate (Fuels) 3rd Class Joshua Rist, a role player, is secured to a back board by Federal Fire fighters during an active shooter exercise at Naval Air Station Fallon during the Navy-wide force protection exercise Solid Curtain-Citadel Shield 2015. (U.S. Navy photo by Mass Communication Specialist 1st Class Joseph R. Vincent/Released)