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U.S. nuclear-powered submarine USS Providence crosses the Suez canal in Ismailia, Egypt, Saturday, March 12, 2011. Egyptian officials say two U.S. vessels have crossed the Suez Canal on their way to the Mediterranean Sea and closer to the Libyan coast. The nuclear-powered submarine USS Providence and Destroyer USS Mason entered the canal Saturday from the Red Sea. U.S. military officials have ordered warships into the Mediterranean in case they are needed. (AP Photo)