I am not sure I can get enthusiastic over all the anti NK rhetoric right now. They are a very long way from developing a bomb small enough to put on a rocket. Their guidance system does not seem to be that much more sophisticated than a squirrel pointing with a stick. For at least a generation the NK have not been preparing for a war of aggression, but expect one day to face the US and their lackey South Korea in an apocalyptic defensive battle.
And now the US is getting a nice two for one deal over rumors Iran is helping them develop the rocket.