The Los Angeles-class attack submarine USS Providence (SSN 719) transits the Thames River as it departs Naval Submarine Base New London for a six-month deployment in Groton, Connecticut in this file photo taken on October 8, 2010, and released to Reuters on March 19, 2011. U.S. and British ships and submarines launched missile strikes against Libya on March 19, officials said, as the West began a first phase of its military operations to force Muammar Gaddafi from power. REUTERS/Timothy E. Walter/U.S. Navy photo/Handout (UNITED STATES - Tags: MILITARY POLITICS CIVIL UNREST CONFLICT) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS