Tech. Sgt. Israel Del Toro, left, speaks while former President George W. Bush, right, and Ken Fisher, CEO of the Invictus Games, look on before a demonstration of sitting volleyball at the Intrepid Sea, Air and Space Museum in New York, Thursday, Dec. 3, 2015. Sitting volleyball will be one of the adaptive sports to be played during the Invictus Games, a competition between wounded veterans from around the globe. Bush will serve as the honorary chair of the games and the George W. Bush Institute will co-chair a policy symposium on veteran's health. (AP Photo/Seth Wenig), APTOPIX