North Korea will have an operational long range nuclear ICBM that THAAD cannot intercept before the US can develop a counter. Trumps tweets and the mobilization of bombers in Guam prove that this threat is very real. North Korea believes (quite rationally ) that the US will invade and destroy them if they don't get a nuke. Just the lie of WMDs in Iraq was enough to wreck that country and pave the way for ISIS. My darkest guess is America under Trump will unwisely launch an attack to preempt all this, millions will die in Seoul from NKorean artillery, N Korea will launch its nuke, THAAD will be ineffective and a US city on the west coast will cease to exist under a mushroom cloud. N.Korea will also cease to exist as an independent regime, but the world will then have a major climate problem and a modern day American Hiroshima. Trust in Pax Americana will be in ruins. China will step up and immediately occupy NKorea. They have the money, the manpower and the motive. God I hope I'm wrong.