U.S. Marine Corps veteran Derek Lui swims the breaststroke in the men's blind and visually impaired 50-meter event during the 2012 Marine Corps Trials at Camp Pendleton, Calif., on Feb. 21, 2012. The trials were part of the Wounded Warrior Regiment's Warrior Athlete Reconditioning Program and hosted 300 wounded Marines, veterans and international service members. The participants competed for a spot on a roster of 50 athletes who advanced to the Wounded Warrior Games, a competition of all service branches scheduled for May 2012 in Colorado Springs, Colo.