U.S. Air Force Maj. Vincent Sherer, 455th Air Expeditionary Wing pilot, taxis an A-10 Thunderbolt II aircraft at Bagram Airfield, Afghanistan Aug. 5, 2014. The A-10 is a specialized ground-attack aircraft which provides close air support to ground forces operating in Afghanistan. (U.S. Air Force photo by Staff Sgt. Evelyn Chavez/Released)