The Coast Guard Cutter Polar Star transits near the beginning of the ice edge in the Chukchi Sea north of Wainwright, Alaska, Tuesday, July 16, 2013. The Polar Star is participating in the 17th District's operation Arctic Shield 2013 and the crew is conducting ice trials following the conclusion of a major refit. (U.S. Coast Guard photo by Petty Officer 1st Class Sara Mooers)
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