The crew of the Coast Guard Cutter Polar Star transits past the Ross Ice Shelf prior to departing Antarctica, Feb. 9, 2017. The Polar Star's crew conducted icebreaking operations in the frozen Ross Sea for cargo vessels to resupply the National Science Foundation's research stations in Antarctica. ( Coast Guard photo by Chief Petty officer David Mosley)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
License: Licensed
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Keywords: 2017, antarctica, coast, deep, freeze, guard, ice, icebreaking, operation, polar, ross, seattle, shelf, star