"The international community pledged to strike back with an iron fist after North Korea's sixth nuclear test, with Japan and South Korea agreeing to 'an entirely different level' of retaliatory measures including harsh new sanctions."
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That is a joke, NK today can easily beat anyone except a few nuclear powers.
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"But the spectre of military reprisal came as technical experts and political analysts said North Korea should be seen as credible in claiming that it has tested a hydrogen bomb, one it said was small enough to be fitted into a long-range missile. South Korean experts said the Sunday detonation was more than three times more powerful than the bomb dropped on Hiroshima."
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It is a boosted fission bomb at least. To do that NK has to master implosion technology which means miniature ...