From: NY Times

WASHINGTON — A pair of nuclear-powered Russian attack submarines has been patrolling off the eastern seaboard of the United States in recent days, a rare mission that has raised concerns inside the Pentagon and intelligence agencies about a more assertive stance by the Russian military.

The episode has echoes of the cold war era, when the United States and the Soviet Union regularly parked submarines off each other’s coasts to steal military secrets, track the movements of their underwater fleets — and be poised for war.

But the collapse of the Soviet Union all but eliminated the ability of the Russian Navy to operate far from home ports, making the current submarine patrols thousands of miles from Russia more surprising for military officials and defense policy experts.

“I don’t think they’ve put two first-line nuclear subs off the U.S. coast in about 15 years,” said Norman Polmar, a naval historian and submarine warfare expert. …

One of the submarines is the newer Akula II, officials said, which is quieter than the older variant and the most advanced in the Russian fleet. The Akula is capable of carrying torpedoes for attacking other submarines and surface vessels as well as missiles for striking targets on land and at sea.

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