U.S. Air Force Staff Sgt. Mark Cantarero, a 97th Security Forces Squadron unit trainer and evaluator from Altus Air Force Base (AFB), Oklahoma, prepares to set off the machine gun simulator to imitate automatic weapons fire while training Airmen from the 507th Civil Engineering Squadron (CES) PRIME BEEF training at Fort Sill, Oklahoma, April 1, 2022. Cantarero helped the 507th CES Airmen from Tinker AFB, Oklahoma, practice reaction to contact during field patrolling. (Courtesy photo)