A case of 40mm practice grenades used by the 88th Security Forces Squadron combat arms instructors at Camp Atterbury in Edinburgh, Indiana, on Feb. 25, 2021. The combat arms instructors, from Wright-Patterson Air Force Base, Ohio, travel to Camp Atterbury multiple times each year for readiness and qualification training with deployers on machine guns and grenade launchers. (U.S. Air Force photo by Ty Greenlees)