More than 40 ships and submarines representing 15 international partner nations travel in formation in the Pacific Ocean July 25, 2014, during the Rim of the Pacific (RIMPAC) 2014 exercise. 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. (DoD photo by Mass Communication Specialist 1st Class Shannon E. Renfroe, U.S. Navy/Released)