Crewmembers aboard Coast Guard Cutter Healy offload pallets after loading scientific equipment Aug. 6, 2015, in preparation for 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, with a focus on the Arctic Ocean. ( 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: alaska, arctic, geotraces, healy, icebreaker