Marine veteran Bradley Walker throws up the ball for a serve during a scrimmage volleyball match with the U.S. Olympic Committee staff, the Colorado community, and a combination of Army, Navy, Air Force and Coast Guard athletes. The event allowed the Marine athletes to practice and showcase their skills for the upcoming Warrior Games. The Games will be held at the Olympic Training Center in Colorado Springs, Colo. May 16-21. - Marine veteran Bradley Walker throws up the ball for a serve during a scrimmage volleyball match with the U.S. Olympic Committee staff, the Colorado community, and a combination of Army, Navy, Air Force and Coast Guard athletes. The event allowed the Marine athletes to practice and showcase their skills for the upcoming Warrior Games. The Games will be held at the Olympic Training Center in Colorado Springs, Colo. May 16-21.