Angela Madsen, front, an U.S. Marine Corps veteran and Paralympic athlete, adjusts a shot put apparatus before competing in the 2012 Paralympic Games in London Sept. 1, 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)