in paula hancocks. paula, the fifth nuclear test north korea appears to have conducted and the most powerful one and coming on the heels of president obama s visit to asia. reporter: that s right. the timing certainly is interesting, john. the fact is north korea announced on state-run television saying they successfully tested the nuclear warhead and they can put that on any one of the ballistic missiles. it is impossible for the world to verify that specifically in washington and seoul and tokyo. in the past hour, there has been an intelligence briefing for lawmakers here in seoul. they have said they believe north korea s goal is to mount a nuclear warhead on a scud missile. remember 28,000 u.s. troops in south korea are here now. this is going much quicker than expected. intelligence says north korea has advanced quicker than expected. there is large interest around the world in china and japan and russia condemning the nuclear test. it shows that kim jong-un is determi