MARINE CORPS AIR STATION MIRAMAR, Calif.—Officer Jason Frederickson, a civilian police officer with the Provost Marshalls Office, provides rear security while a fellow officer clears a room at Navy Marine Reserve Center aboard Marine Corps Air Station Miramar, Calif., April 2. The scenarios are conducted in the most authentic method possible. - MARINE CORPS AIR STATION MIRAMAR, Calif.—Officer Jason Frederickson, a civilian police officer with the Provost Marshalls Office, provides rear security while a fellow officer clears a room at Navy Marine Reserve Center aboard Marine Corps Air Station Miramar, Calif., April 2. The scenarios are conducted in the most authentic method possible.