Coast Guard Cutter Healy cruises through the Arctic Ocean Aug. 19, 2015, in support of the Geotraces mission. Geotraces is Healy's second science mission of the summer, and is an international effort to study the distribution of trace elements in the world's oceans. ( Coast Guard photo by Petty Officer 2nd Class Cory J. Mendenhall)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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Keywords: arctic, coast, geotraces, guard, healy, icebreaker, mendenhall, ocean