U.S. Tech. Sgt. James Armstrong (foreground) from the 177th Security Forces Squadron explains proper room clearing procedures with Tech. Sgt. Andrew Hambleton (background) during an exercise scenario on Nov.16, 2013 at the FAA Training Facility, N.J. Airmen practiced scenarios ranging from room clearing to entry procedures during the exercise. (U.S. Air National Guard photo by Airman First Class Shane Karp/Released)