american b-1 bombers and south korean fighter jets flew over the korean peninsula and the u.s. military says a test of its missile defense system thaad was successful. the system was designed to track and intercept missiles before they reach their targets. weapon experts fear that the latest launch of this intercontinental ballistic missile believes that north korea now has the capability to threaten major u.s. cities. i am joined by msnbc contributor steve collegeons who is editor-at-large for "the atlantic" and author of "a nuclear showdown," north korea takes the world. good to have you here. let me begin with you because you heard the vice president saying china could do more. what are we asking them to do more than we already know? >> first of all, we're asking china to stop the flow of money into the north korean regime. we're asking them to stop money laundering for north korea which the banks are doing, and the one