An A-10 Thunderbolt II aircraft fires its primary weapon, a GAU 30mm Gatling gun, during a training flight. The aircraft is flown by the 107th Fighter Squadron, part of the 127th Wing, Michigan Air National Guard, at Selfridge Air National Guard Base, Mich. The Selfridge-based A-10 unit is preparing to deploy approximately 300 Citizen-Airmen to Afghanistan. (USAF Photo by MSgt. Terry Atwell)