Vladimir Putin has repeatedly threatened to nuke anyone interfering in the Ukraine war and while experts agree the chances of a strike on the West are low, the possibility cannot be discounted. Joe Biden has personally warned that the chances of 'Armageddon' are now greater than at any time since the Cuban Missile Crisis. So, what would actually happen if a nuclear bomb were to strike London (top left), Washington DC (top right), New York (bottom left), or Paris (bottom right)? Dr Jeffrey Lewis, of the Middlebury Institute, walks MailOnline through the horrifying consequences – including the landmarks that would be utterly destroyed and the places where people would be most-likely to survive. What happens if the nukes fall? Amid fears that Putin will detonate nuke over Black Sea, expert reveals which parts of NY, London and other cities would be instantly obliterated … and where you'd stand best chance of surviving