A U.S. Navy personnel salutes as officers board the USS North Carolina (SSN-777) submarine docked at Changi Naval Base in Singapore April 28, 2014. The U.S. Navy Virginia-class nuclear submarine ... more 
A U.S. Navy personnel salutes as officers board the USS North Carolina (SSN-777) submarine docked at Changi Naval Base in Singapore April 28, 2014. The U.S. Navy Virginia-class nuclear submarine arrived in Singapore April 26 for a routine visit as part of its second deployment to the Western Pacific. REUTERS/Edgar Su (SINGAPORE - Tags: MILITARY MARITIME) less 
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Reuters | Photo By EDGAR SU / REUTERS
Mon, Apr 28, 2014 12:51 AM EDT