Staff Sgt. Jude Mares, 9th Security Forces combat arms training and maintenance instructor, discharges his fire arm during a training course meant to help instructors to stay proficient with weapon systems at Beale Air Force Base, California, July 31, 2018 . CATM instructors are trained at Joint Base San Antonio-Lackland, Texas and are recertified on an annual basis by their shops NCOIC. (U.S. Air Force photo by Senior Airman Justin Parsons)