trump feels frustration at moon's stance toward north korea, feeling it's too soft. certainly, we saw that frustration play out in that tweet. also on top of that, you've got the fact that the u.s. president wants to renegotiate the free trade deal which certainly many inside korea thought was signed, sealed and delivered. they don't want to, but they will. >> it was but the president certainly has the authority to pull out. big promise that he made to a lot of his base. we'll see what happens and what it all means for one of our key allies in the region. thank you very much, paula hancocks, in seoul. fred pleitgen joins us in moscow. ramping up for their military preparedness. what are they doing in the face of this increased north korean aggression? >> reporter: well, the rugs hru have said that they're very concerned about that nuke test by the north koreans. we have to keep in mind russians also have a common border with north korea, poppy. what they're also doing is