Students from the California State University Maritime Academy tour the dry dock floor below the Coast Guard Cutter Polar Star while the cutter undergoes critical maintenance and repair at a dry dock facility in Vallejo, Calif., Oct. 3, 2018. The Seattle-based Polar Star is the Coast Guard’s only remaining operational heavy icebreaker. Coast Guard

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Size: 1155px × 1731px
Photo credit: © David Wa / Alamy / Afripics
License: Licensed
Model Released: No

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