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russian submarine buildup sciutto dnt lead_00000905
russian submarine buildup sciutto dnt lead_00000905

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    U.S. Navy alarmed by Russian submarine buildup

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U.S. Navy alarmed by Russian submarine buildup

Russia is deploying ballistic missiles and attack submarines in numbers, range and aggression not seen in two decades. CNN's Jim Sciutto reports.

U.S. Navy alarmed by Russian submarine buildup

Russia is deploying ballistic missiles and attack submarines in numbers, range and aggression not seen in two decades. CNN's Jim Sciutto reports.