U.S. Secretary of Defense Ashton Carter, left, shakes the hand of U.S. Marine Corps Gen. Joseph Dunford, right, commandant of the Mairne Corps, during the 2015 Department of Defense (DOD) Warrior Games opening ceremony at the National Museum of the Marine Corps Triangle, Va., June 19, 2015. The Warrior Games, founded in 2010, is a Paralympic-style competition that features eight adaptive sports for wounded, ill, and injured service members and veterans from the U.S. Army, Marine Corps, Navy/Coast Guard, Air Force, Special Operations Command, and the British Armed Forces. This year marks the first time the DoD takes responsibility for operational planning and coordination of the event, in which approximately 250 athletes are expected to compete. (U.S. Marine Corps Photo by Lance Cpl. Timothy A. Turner/Released)