Air Force Reserve Tech. Sgt. Gregory St. Martin of

Air Force Reserve Tech. Sgt. Gregory St. Martin of the 434th Security Forces Squadron at Grissom Air Reserve Base, Indiana, looks through the scope of an M4 carbine rifle Aug. 18, 2017, during a tactical engagement simulation drill at exercise Patriot Warrior at Fort McCoy, Wisconsin. Martin was among more than 600 Reserve Citizen Airmen to participate in Patriot Warrior, the Air Force Reserve Command's premier exercise, which provides an opportunity for Reserve Citizen Airmen to train with joint and international partners in airlift, aeromedical evacuation and mobility support. (U.S. Air Force photo by Tech. Sgt. Efren Lopez)