The White House has expressed doubt over whether North Korea has actually successfully tested a hydrogen bomb.
According to reports, an initial analysis of the available data was "is not consistent" with North Korea's claims that they had deployed a hydrogen bomb for the first time, they said.
White House spokesman Josh Earnest said nothing had happened to change the USA's assessment of North Korea's technical or military capabilities, and added the government is still working to learn more about the claimed test.
Experts have echoed the White House's doubts, claiming that the explosion from the bomb was not large enough to have truly been created by a hydrogen bomb.
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