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North Korea has a long history of making bellicose threats that defy global norms. So does that mean the country's leaders are irrational, and will act irrationally?
07 November, 2017
People watch a news report on North Korea's first hydrogen bomb test at a railroad station in Seoul on January 6, 2016. (JUNG YEON-JE/AFP/Getty Images)
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North Korea kim jong un hermit kingdom nuclear weapons nuclear missile south korea china military foreign intervention foreign policy