Why the sudden collapse of North Korea would be hell on Earth

Why the sudden collapse of North Korea would be hell on Earth:
"There is no nation on the planet more dangerous than North Korea — and that's putting it charitably.
The leader of the so-called "hermit kingdom," Kim Jong Un, is the master of his own personal hell six decades in the making.
It includes labor camps described by a North Korean defector as worse than Auschwitz and a population, brainwashed into thinking the Kim family is a god, with no hope for a brighter future or any chance of freedom.
To make matters even worse, Kim is now armed with nuclear weapons that most experts think can hit not only South Korea and Japan, but in the next few years, the U.S. homeland.
By 2020, some scholars believe North Korea could have enough atomic material for 100 nuclear bombs.
But in all fairness, there is one event possibly even more perilous than Pyongyang showing itself capable of launching a nuclear attack on Asia or America. 
Oddly enough, it is something many experts over the last few weeks have been rooting for — the collapse of North Korea's government..."
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