North Korean Supreme Leader Kim Jong-un. Photo: Flickr.

World leaders sternly criticized North Korea on Wednesday for carrying out a fourth nuclear test, an explosion that Pyongyang claimed was an exponentially more powerful hydrogen bomb.

However, there was a considerable amount of skepticism about the North’s assertion. Nuclear experts and the South Korean military saying that the size of the blast was consistent with an atomic explosion, not an enormous hydrogen bomb.

Read full story at The Washington Post.