More than 40 ships and submarines representing 15 international partner nations travel in formation in the Pacific Ocean during the Rim of the Pacific (RIMPAC) 2014 exercise in this U.S. Navy photo taken July 25, 2014, and released July 31, 2014. RIMPAC is a U.S. Pacific Fleet-hosted biennial multinational maritime exercise. REUTERS/U.S. Navy/Mass Communication Specialist 1st Class Shannon E. Renfroe/Handout (UNITED STATES – Tags: MILITARY POLITICS) THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS – RTR40UA4