U.S. Navy Chief Yeoman Javier Rodriguez-Santiago, not shown, leaves his prosthetic leg on the sidelines during a sitting volleyball practice session for the Wounded Warrior Pacific Invitational(WWPI) at a fitness center at Joint Base Pearl Harbor-Hickam, Hawaii, Jan. 7, 2014. WWPI was a competition among wounded Service members with the Air Force, Army, Coast Guard, Navy and Special Operations Command.