because china is meant to be having the most influence on north korea. however in the last few years even china's influence on north korea has diminished. there's been a much harder line since xi jinping became president and not the close relationship that used to exist. kim jong-un has not met with xi jinping so there is a lot of political posturing. but the scientific, the technological, all of that is going ahead in north korea. and the objective now is to try to stall it before trying to roll it back and it is very difficult to see how that is going to happen but seems to be that is the only way. some kind of proper negotiation to get to that point. >> thank you. u.s. markets are reacting this morning. the dow falling sharply on the news. christine romans is here with more. >> stock investors like predictability, they like world