Naval Aircrewman Airman Brett Parks, center, prepares for his 50m mixed lower body amputee freestyle heat 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.