Tech. Sgt. John Fergerson, a noncommisioned officer with the 940th Security Forces Squadron, explains the importance of the entry control point to Airmen during the Ability to Survive and Operate exercise Nov. 4 at Beale Air Force Base, California. Reservists from the 940th Air Refueling Wing and 38th Intelligence Squadron participated in the exercise. (U.S. Air Force photo by Senior Airman Tara R. Abrahams)