The K-3 'Leninsky Komsomol' is the first Soviet and the third nuclear submarine in the world. It served in the Northern Fleet of the USSR Navy for almost 30 years: it went out for combat service six times, was the first to pass under the ice of the Arctic Ocean and twice crossed the North Pole. In the 2000s, it was decided to turn the submarine into a museum and was brought to Kronstadt.
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