North korea hydrogen bomb
North Korea may consider H-bomb test in Pacific, Kim calls Trump 'deranged'
Kim Jong Un did not specify what action he would take against the United States or Donald Trump.
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North Korea warns US of 'greatest pain', rejects sanctions
The UN Security Council unanimously stepped up sanctions against North Korea on Monday.
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Why hydrogen bombs are much harder to make than atomic bombs
Nine countries are believed to have developed nuclear weapons, but only five are thought to have tested H-bombs: the US, China, Russia, the UK and France.
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North Korea confirms sixth nuclear test
This comes just hours after Pyongyang said it had developed an advanced hydrogen bomb that possesses “great destructive power”.
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North Korea earthquake suggests sixth nuclear test
Two shallow earthquakes shook North Korea on Sunday, suggesting it had detonated a sixth nuclear test device.
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North Korea says it has developed 'advanced hydrogen bomb'
The report by North Korea’s official KCNA news agency comes amid heightened regional tension.
