community, watching north korea all the time, making calculations about their weapons program, even over the last several months, what they have, what they could do, how quickly they could restart it. all of this intelligence gathering has continued as you would expect to go on for months now. and it is never stopped. so the administration is in a position to be ready if the north koreans take action. but the real question is what is going on in kim's head right now that made them engage in this rhetoric. and lead to the summit being put off. >> just weeks before it was set to happen. barbara starr, thank you. it is the top of the hour, 10:00 a.m. eastern. let us bring you the breaking news. welcome again to our viewers here in the united states and around the world. significant breaking news on this thursday morning. the planned summit, the historic summit in just a few weeks between kim jong-un and president trump is now off. this coming in a letter that president trump has written to kim jong-un.