Petty Officer 1st Class David Edelson, a boatswains mate onboard the Coast Guard Cutter Healy, clears a path in the ice for an unmanned underwater system in the Arctic, July 29, 2017. The UUS is a small-unmanned platform that is capable of executing a pre-programmed mission underwater and then return to the surface for recovery of the vehicle and its recorded data. Coast Guard

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Photo credit: © Bob Collet / Alamy / Afripics
License: Licensed
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