"You know, it's hard to say this, but I suspect that Obama is afraid either of blackmail potential or even worse. And he has referred to the killing of Dr. Martin Luther King Jr. in this main saying, "don't you remember what happened to Dr. King?""

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Most people in Seoul don't care about the North's belligerent statements: The farther one is from the Korean Peninsula, the more one will find people worried about the recent developments here. Scary impressions are important to North Korea because for the last two decades its policy has been, above all, a brilliant exercise in diplomatic blackmail. And blackmail usually works better when the practitioners are seen as irrational and unpredictable.

— Andrei Lankov