South Korea, China, Japan, Russia, Taiwan, and the US lie within easy range of a North Korean nuclear weapon -- and these are just the major and fairly-major powers.

Let's not forget the other countries, such as Mongolia and the Philipines, the countries of Oceania....

Do you seriously think that they are going to let DPRK have nukes that could be used or shipped to other countries? If the UN doesn't move quickly, other countries will.