Crew members aboard Coast Guard Cutter Healy conduct a damage control drill Aug. 11, 2015, while underway in support of the Geotraces expedition. Geotraces is an international effort to study the distribution of trace elements in the world's oceans and to establish the effects of these elements on global climate change. ( 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, bering, coast, geotraces, guard, healy, icebreaker, mendenhall, ocean, sea