So the sociopathic megalomaniac Kim JungUn started threatening Guam, HI, and the U.S. West Coast with missile strikes in early-2013. KJU continued to openly threaten Guam over the proceeding 4 years. Of course, NK continued to develop its nuclear ambitions including successful detonations in 10/2006; 5/2009; 2/2013; 1/2016; and 9/2016. 4 of the 5 nuclear detonations occurred during Obama's watch. Likewise, NK missile development also accelerated during the past 10 years. In July NK launched an ICBM with down-range capability of reaching Chicago, IL. U.S. and international intelligence estimates believe NK now possesses between 30 and 60 nuclear weapons. 

You may certainly emigrate to North Korea. You'll have to travel to the country directly and present yourself in Pyongyang. The U.S. doesn't have formal diplomatic relations with the brutal regime. Fortunately, you'll be hailed as a North Korean "Hero of the People" and enjoy celebrity status in the country.