Eric Hollen, an U.S. Army veteran and Paralympic athlete, competes in a 50-meter pistol competition at the Royal Artillery Barracks in London Sept. 6, 2012, during the 2012 Paralympic Games. The Paralympics is a major international sporting event in which thousands of athletes, including wounded and injured U.S. service members, participate in a variety of sporting events. (U.S. Air Force photo by Master Sgt. Sean M. Worrell/Released)