I agree. Yes, they've had a number of failures with their missile tests, and people make fun of them when that happens, but let's not laugh too loud. They are learning from these mistakes, and sooner or later they will work out the bugs and have the capability to hit the U.S. mainland with nukes. We need to take them out before that happens.
When NoKo’s run out of money and starvation becomes unsustainable, they can simply sell their 6 nukes to ISIS, Iran, Al Nusra or Al Qaeda. Then sneak the dirty bomb through the non-existing southern border without a wall.