Two U.S. Army AH-64E Apache Guardian helicopters assigned to the 1st Battalion, 25th Aviation Regiment, Combat Aviation Brigade, 25th Infantry Division prepare to launch from the flight deck of the amphibious assault ship USS Peleliu in the Pacific Ocean during deck landing qualifications as part of the Rim of the Pacific 2014 exercise July 19, 2014. RIMPAC is a U.S. Pacific Fleet-hosted biennial multinational maritime exercise designed to foster and sustain international cooperation on the security of the world's oceans.