NATO is stepping up its Arctic patrols. A key goal is getting eyes on Russian subs before they can disappear into deep water.

Tech Insider : Business
Russian submarines sail during the annual Navy Day parade in the far eastern port city of Vladivostok, Russia, July 30, 2023.
NATO officials say there has been an uptick in Russian submarine activity in the North Atlantic in recent years.

REUTERS/Tatiana Meel

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