Sgt. Shawn Edens tests a door to see whether it is locked during active shooter training for Security Battalion April 19. - Sgt. Shawn Edens tests a door to see whether it is locked during active shooter training for Security Battalion April 19.
Two Marines from Security Battalion approach a building for a force-on-target training exercise aboard Marine Corps Base Quantico on Nov. 17. - Two Marines from Security Battalion approach a building for a force-on-target training exercise aboard Marine Corps Base Quantico on Nov. 17.
Lt. Col. Shane Gouker, operations officer for Futures Directorate, Combat Development and Integration Department, plays the role of a renegade shooter at The Raymond G. Davis Center aboard Marine Corps Base Quantico during an active-shooter drill with role players Tuesday. - Lt. Col. Shane Gouker, operations officer for Futures Directorate, Combat Development and Integration Department, plays the role of a renegade shooter at The Raymond G. Davis Center aboard Marine Corps Base Quantico during an active-shooter drill with role players Tuesday.