with the chinese southern devalue has proved very rough for chinese markets. matt rivers in beijing, thank you. we ll turn now to north korea s claim of testing a hydrogen bomb. and right now, the focus on what it may have detonated if it wasn t an h-bomb. the white house says initial analysis has not been consistent with north korea s claims. still some experts say it s possible pyongyang detonated a boosted weapon, which would have had a hydrogen element. meanwhile, world leaders continue to condemn north korea. u.s. lawmakers are discussing broader sanctions on north korea with a vote possibly going to the house floor as early as next week. u.s. president barack obama spoke with a number of asian leaders on wednesday including south korea s president, reaffirming his support to their security. paula hancox live with more on this. paula, i guess the doubts are really starting to grow now over