Polar Bear, the U.S. Coast Guard icebreaker, works the ice channel near McMurdo, Antarctica in this handout photo taken January 10, 2002. The United States is sending the Polar Star to help free ... more 
Polar Bear, the U.S. Coast Guard icebreaker, works the ice channel near McMurdo, Antarctica in this handout photo taken January 10, 2002. The United States is sending the Polar Star to help free Russian ship Akademik Shokalskiy and Chinese icebreaker Snow Dragon gripped by Antarctic ice, the Coast Guard said on January 4, 2013. The Polar Star is responding to a request for assistance from Australian authorities as well as from the Russian and Chinese governments, it said in a statement. REUTERS/U.S. Coast Guard/Rob Rothway/Handout via Reuters (ANTARCTICA - Tags: ENVIRONMENT MILITARY MARITIME POLITICS) ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS PICTURE IS DISTRIBUTED EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS less 
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Reuters | Photo By US COAST GUARD / REUTERS
Sat, Jan 4, 2014 4:46 PM EST