All the pumped up warmongers who are posting here about attacking North Korea don't seem to realize a basic fact about this situation. Seoul, South Korea's capital - with a metro population of 25 million people - is only 35 miles from the border with North Korea. Along that border is a huge arsenal of missiles and artillery aimed directly at Seoul. Any attack on North Korea would be devastating for Seoul. This is why the North has never been attacked, and despite the Trump/Tillerson bluster is unlikely to be attacked any time soon.