I like the details for explaining North Korea in this article and thank you for sharing it. If we look at the logical perspective, it's actually a battle between west and soviet by way in sphere of influence; soviet shared some IPs to north Korea, likewise the US to south. After the collapse of soviet, North Korea left with no choice but to accelerate there nuclear program as way of insurance from potential enemy. Conclusion- Nuclear War is Possible but All nations have common sense that does not create a good result. :)