I do not think that the North Koreans are technically able to create a hydrogen bomb.I do not think they have the scientists capable for a development of a hydrogen bomb. The leadership can barely feed their people and maintain a 1.2 million man army. Anyways, the South Korean military and the Science ministry would have alerted the public of a threat.
"The release of xenon gas in May throws the conventional view into doubt. . . . doubters need to come up with a plausible explanation why xenon was wafting over the North Korean countryside last month."
yitbos