This means that the pact between the 2 Koreas about a nuclear free Korean Penninsula is dead giving the way for the north to build nuclear bombs without any treaty or pact and this action by North Korea what it does is escalate big time the tensions between the US and North Korea.
Let's pray that another war doesn't come with this but I see this situation going into military action by the US bombing the Yongblon plant and if the US goes there the north will start the invasion to the south and war will start because I dont see that reconciliation is there between the US and the north unless the north changes it's position and stop building the nukes and I see that far from reallity.

But I hope that China convince the North Koreans that it is in their best interest to get rid of the nukes and open up to the real world as that country is a close society.