Daily Mail (UK), 31 October 2019: Russian nuclear submarines sailed past UK waters on secret mission into the Atlantic to prove they can strike the United States in largest operation since the Cold War
Mirror (UK), 30 October 2019: Putin deploys 10 heavily armed submarines for secretive mission to the US
Business Insider, 14 October 2019: Russia's submarines are getting harder to find, and the Navy is sending more people to keep an eye on them
The Barrents Observer, 14 October 2019: Russia announces massive trans-Arctic nuclear war games
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