New sub recently launched capable of delivering ICBM's

http://www.businessinsider.com/russia-most-advanced-submarine-just-launched-2017-11

The biggest difference in the Knyaz Vladimir is its ability to launch four additional RSM-56 Bulava ballistic missiles, each capable of carrying multiple nuclear warheads.

As Franz-Stefan Gady at The Diplomat points out, this means that the Knyaz Vladimir "will be capable of launching 96-200 hypersonic, independently maneuverable warheads, yielding 100-150 kilotons apiece," meaning each warhead alone is ten times more powerful than the bomb dropped on Hiroshima.

That is enough to devastate the entire eastern seaboard of the United States — and then some. All of from just one submarine.