Spent shells from a M240B machine gun rest on the ground, March 20, 2023, at Camp James A. Garfield Joint Military Training Center, Ohio. Reserve Citizen Airmen assigned to the 459th Security Forces Squadron, Joint Base Andrews, Maryland, participated in a two-week Integrated Defense Leadership Course where Defenders developed combat readiness skills needed for wartime situations. (U.S. Air Force photo by Staff Sgt. Christina Russo)