Worse that ll probably happend is north korea launches nukes at south korea/japan, if america decides to invade or bomb them.
There could be millions and millions of deaths, but it probably wont kick off a world world or anything like it.
Would still suck, so yeah I hope it doesnt happend.
I honestly don't understand all the worrying and attention about North Korea. The chances are that they won't do anything because if they did China wouldn't support them and they would lose in a war. Kim probably knows that too because he has made threats like this before and nothing has come out of them. The sad thing is that I feel bad for the North Koreans that live under terrible conditions and how they are treated by their government. Its sad and I wish there was something that can be done to help them. Even if a war were to start many of them would be forced to join the military and lots of civilians would die. Its like there's nothing that can be done to help them. Hopefully the next leader after Kim does something to help the people and improve NK relationship with the rest of the world.