North Korea claim successful hydrogen bomb test

North Korea claimed Wednesday that it had successfully tested a hydrogen bomb, a claim that, if true, would mark a huge step forward in its nuclear capability.

Joe Cirincione, president of the Ploughshares Fund, a global security foundation and author of “Nuclear Nightmares: Securing the. World Before It Is Too Late,” said Wednesday that he doubted North Korea had exploded a “real” hydrogen bomb. More likely, he said, Pyongyang detonated a “boosted” weapon with tritium added to increase the yield of a fission bomb.