Senior Airman Darian Brown, 439th Security Forces Squadron patrolman, demonstrates how to clear the barrel of an M16 rifle, at Westover Air Reserve Base, Mass. June 8, 2019. The 439th SFS launched their new weapons simulation training program to help ensure trainees in the Development and Training Flight are ready for Basic Military Training. (U.S. Air Force photo by Staff. Sgt. Tamara Williams/released)