NK can not vaporize whole cities.
Im not going to vote but this is highly unrealistc.
Ulrik54: or place a line of DEST on top
trump has declared war on north korea!
If you think this is too strong then look up Tsar Bomba
this is the nuclear missle exploding before attack.
This is wrong in a lot of ways. First of all, while North Korea does have the missile capability to hit most of Japan and all of SK, the reliability isn't all that great. Not as bad as some here would believe, but are still likely to fail. Second, and this is the big one, no nuke is that strong.
This destroyed a huge amount of area, while the best nukes the soviets had would maybe destroy half of new york city. North Korea won't have anything near that for decades, at minumum, assuming they don't get their face kicked in before hand