Retired U.S. soldier Kari Miller, center, a U.S. sitting volleyball team member, talks with her teammates before an exhibition game with China at the Paralympic Games in London Aug. 31, 2012. 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)