As Russian Subs Encroach, Britain Seeks a Sub-Hunter

It's been a busy year for anyone who counts Russia as its neighbor. Ever since Vladimir Putin began his Great Ukrainian Adventure last year, the cycle of reaction, counter-reaction, and counter-counter-reaction has raised tensions in the North Atlantic. In the skies above Europe, Russian combat aircraft repeatedly probe NATO air defenses. In the waters below, unidentified submarines - presumed to be Russian -- keep popping up off the shores of Sweden, Finland, and beyond.

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