had indirect impact on north korea. >> and, yet, gordon, what do you think about whether these sanctions and maybe further actions by the u.s. that we'll see how it really will affect the situation, sending a message to north korea that cyber hacking isn't effective, if china isn't brought into the equation? >> china needs to be brought into the equation because more than half of north korea's cyber warriors are actually based in china. and these attacks against sony pictures entertainment were routed through chinese i.p. addresses which means that beijing knew what was going on. that's a big omission as steve points out. >> how concerned -- you sort of listed a number of things there, steven a range of things that north korea could do. how concerned should we be what do you think the worst thing they could do would be? >> well it's hard to imagine what the worst thing could be.