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us navy nuclear submarine uss hartford arctic sciutto dnt_00021222
us navy nuclear submarine uss hartford arctic sciutto dnt_00021222

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    The nuclear sub challenging Russia in the Arctic

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The nuclear sub challenging Russia in the Arctic

CNN's Jim Sciutto tours the USS Hartford, the US Navy nuclear submarine challenging Russia in the Arctic Ocean.

The nuclear sub challenging Russia in the Arctic

CNN's Jim Sciutto tours the USS Hartford, the US Navy nuclear submarine challenging Russia in the Arctic Ocean.