According to NetEase publication, Russian nuclear submarine of the Borey project (according to other sources, it was an Akula project submarine), approached the US coast unnoticed. It was possible to establish the whereabouts of the nuclear submarine with up to 160 nuclear warheads on boards after the sub started going back to the base. A submarine of this class is capable of destroying most of the territory of the United States of America in minutes.
Russian nuclear submarines will be able to constantly patrol the waters near the US coast in the event that Russia decides to build a naval base in Cuba or Venezuela, as representatives for the Russian Foreign Ministry earlier said.
See more at https://english.pravda.ru/news/world/150057-russian_submarine/