U.S. Navy Adm. Harry Harris, center background, the commander of U.S. Pacific Fleet, announces the beginning of Rim of the Pacific (RIMPAC) 2014 during a press conference at Joint Base Pearl Harbor-Hickam, Hawaii, June 30, 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.