Charlie Walker, a 2015 Help for Heroes wheelchair basketball competitor, takes a shot during the Air Force Wounded Warrior Trials on Nellis Air Force Base, Nev., March 1, 2015. The Air Force Trials are an adaptive sports event designed to promote the mental and physical well-being of seriously ill and injured military members and veterans. More than 105 wounded, ill or injured service men and women from around the country will compete for a spot on the 2015 U.S. Air Force Wounded Warrior Team which will represent the Air Force at adaptive sports competitions throughout the year. (U.S. Air Force photo by Senior Airman David R. Cooper/Released)