Britain's Prince Harry prepares to throw a football at the U.S. Air Force Academy in Colorado Springs, Colo., Sunday, May 12, 2013. (AP Photo/Rick Wilking)

Britain's Prince Harry, left, watches a football demonstration with U.S. Air Force Academy head football coach Troy Calhoun, center, and team mascot "The Bird" at the Academy in Colorado Springs, Colo., Sunday, May 12, 2013. (AP Photo/Rick Wilking)

Britain's Prince Harry is offered a shoe as a souvenir by the U.S. Air Force Academy mascot "The Bird" at the academy in Colorado Springs, Colo., Sunday, May 12, 2013. (AP Photo/Rick Wilking)

Britain's Prince Harry tries his hand at throwing a football to a receiver, right, at the U.S. Air Force Academy in Colorado Springs, Colo., Sunday, May 12, 2013. The Warrior Games, which takes place at the academy, is a Paralympic-style competition featuring injured servicemen and women from the U.S., United Kingdom, Canada and Australia. (AP Photo/Rick Wilking)

Britain's Prince Harry kneels down at the bottom of a pyramid of cheerleaders, U.S. and British military officials and near the U.S. Air Force Academy mascot "The Bird" at the academy in Colorado Springs, Colo., Sunday, May 12, 2013. (AP Photo/Rick Wilking)

Britain's Prince Harry tries his hand at throwing a football at the U.S. Air Force Academy in Colorado Springs, Colo., Sunday, May 12, 2013. (AP Photo/Rick Wilking)