Snow wroteNorth Korea is acting as if they can take on the world, like i said many times before. The US will just blow then out of existence if they try anything.
For example, if they did (did) launch a missle at the US killing people it would't be as big to destroy the US. Donald Trump won't give the orders of "yes launch one back at them like they did to us" he will just order for them to be wiped out of Existence.
Even if one of North Korea's nukes made impact in America; it would have a bigger devastation that most people think. Sure, one nuke can't wipe America off the map, but one nuke is enough to kill millions of people and cripple the economy. You have to account for multiple things in a nuclear strike. The blast radius where people will be turned to ashes, the radius in which sever 3rd degree burning would happen and then you have to account for the yield that will travel from the trade winds, that will also get into the water supply and food supply of said affected areas. Now back to the economy. If a nuclear bomb is dropped on a power-grid, whatever state(s) rely on that power grid(s) are now without power, on top of the already catastrophic damage. Attacks on power grids, hospitals food and water supplies are a great way to send a country into pure turmoil, with the addition of a nuclear bomb hitting.
I remember watching a video where in theory North Korea could also attack the Hoover Dam to cause mass flooding. That would also cause huge problems for a water supply and now you have to deal with nuclear radiation inside flooded water where people who weren't burnt to ashes are now trapped in a radiation cesspool. The Yellowstone Volcano could also be attacked which was theorised could trigger the super volcano to erupt and there is plenty of articles and videos about what will happen if that blows, how the country would be covered in ash that would be extremely harmful to crops and overall breathing, and the possibility of acid rain from the sulfur spewed out by the volcano. Personally, I don't see how that theory comes to light with a nuclear bomb causing Yellowstone to erupt. If/when Yellowstone erupts on it's own however, that's it's own issue to be talked about. Sure, a nuclear bomb will devastate the landscape, but I have such high doubts it would even effect the volcano below the surface. The first chamber is like around 4-10 miles below the Earth's surface, the whole volcano itself is around 400 miles below the Earth's surface. I don't think there is a nuclear bomb (yet) that causes a crater over 2 miles in depth.
All in all, this is in the off chance that North Korea is able to launch a missile to hit America, without it being shot down by either South Korea or Japan and it getting through America's Missile Defense Shield. I also really doubt North Korea would nuke anyone. I honestly believe it is used as a deterrent and with how Kim is a "temper tantrum" idea. He doesn't get his way, he can threat firing a nuke. South Korea and Japan are the ones I think should worry the most from this whole ordeal. Even then, I really only believe North Korea would fire a nuke as a last ditch effort, say they were being invaded and wanted to do what damage they could before the Kim regime was overthrown.