you heard nikki haley yesterday at the u.n. security council meeting, that emergency meeting that was called by the united states, effectively saying, look, we are prepared to use military action. but we're calling on all nations to stop trading with north korea, to essentially choke them out, economically, so that they will stop these actions. the options are so limited. we have seen the united states, other countries, issue sanctions, take a tough stance in the past, but north korea just hasn't listened. this is a critical test for president trump, as he tries to now rally his partners in the region to get tough once and for all with north korea, to try to actually have a difference. so far it hasn't worked. >> kristen welker at the white house, thank you. and president trump as we showed you was cheered by a friendly crowd, corralled by poland's conservative government in warsaw.