SEOUL (Reuters) - A huge explosion rocked North Korea near the border with China three days ago, producing a mushroom cloud that sparked speculation Pyongyang might have tested an atomic weapon, Yonhap news agency reported on Sunday.
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CNN: The U.S. official said the cloud could be the result of a forest fire.
In all the forest fires we've had in the US... how come none have made a huge mushroom cloud or left a blast crater?
"forest fire" in North Korea makes 2mile-wide mushroom cloud
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