Naval Aircrewman Airman Brett Parks, top, swims neck-and-neck against U.S. Air Force Staff Sgt. August O'Neill, en route to placing first place in the 50m mixed lower body amputee backstroke heat by one one-hundredth of a second, during the Wounded Warrior Pacific Invitational swim meet at the Iolani High School's Dillingham Pool. WWPI is a competition among seriously wounded, ill and wounded service members from the Air Force, Army, Coast Guard, Navy and Special Operations Command. The WWPI is the largest joint-service competition to take place outside the annual Warrior Games.