They apparently do not have a very firm grasp on the concept of MAD (Mutually Assured Destruction).
As of September 2015, the United States has a total of 4,571 warheads in its nuclear weapons stockpile — and we already know that our weapons will work, for sure.
I wonder about the probability of NK actually going through with the strikes. At first, it seems impossible to penetrate the defenses of the U.S.. however there is a space craft owned by NK and they could theoretically cut our power and put a hole in Yellowstone to cause a massive crippling catastrophe. Maybe im just over thinking.
What do you think??
http://thehill.com/news-by-subject/foreign-policy/343728-north-korea-threatens-nuclear-strike-on-us