It's nuclear-armed and seems increasingly unstable yet neither America, China nor South Korea has a contingency plan to cope should North Korea's current regime suddenly collapse, warns The Economist. "Planning in advance should help to avoid potentially catastrophic misunderstandings. The outside world’s knowledge of the regime in Pyongyang is minimal and China may not want to offend an old ally. But sooner or later, Mr Kim will go, and that will mark a moment of immense tension in a country where his personality cult is about the only thing the people have left.”