Not just the future but the present for Russia: <a href="http://www.abc.net.au/news/2018-03-02/vladimir-putin-boasts-russias-unstoppable-nuclear-weapons/9500866" rel="nofollow">http://www.abc.net.au/news/2018-03-02/vladimir-putin-boasts-...</a><p>> Mr Putin said the high-speed underwater drone also had an "intercontinental" range and was capable of carrying a nuclear warhead that could target both aircraft carriers and coastal facilities.
TLDR:<p>"With advances in communications and artificial intelligence, it’s not at all impossible to imagine scenarios in which SSN motherships deploy a lethal force of killer torpedoes, capable of remaining on station for days — or longer — while waiting for a victim."