North Korean leader Kim Jong Un heads into 2017 with two things that loom ominous for the rest of the world -- he's tested a nuclear weapon, and no one really knows how willing he'd be to use one in anger. North Korea conducted two nuclear tests in 2016, one in January and another, its most powerful ever, in September. Add that to a string of missile tests, both land- and sea-launched, and the world has plenty of reason for worry. "Combining nuclear warheads with ballistic missile technology in the hands of a volatile leader like Kim Jong Un is a recipe for disaster," Adm. Harry Harris, the head of the US military's Pacific Command, said in a December speech. Read more
