i'm trying to prevent a war. this might be an indication first step down the road that the president is, in fact, trying to prevent a war and not start one as so many of his critics believe. lindsey graham had some words of caution for kim jong un tonight saying, quote, a word of warning to north korean president kim jong un, worse possible thing you can do is meet with president trump in person and try to play him. if you do that, it will be the end of you and your regime. tough words from lindsey graham tonight. sean? >> sean: historic day by any measure. i will have a lot more. that call is very insightful. i will address that in my opening monday dog in a few minutes. joining us now with more on this major breaking news live at the pentagon tonight. jennifer griffin turns out a lot of people might have been taken off guard and from what i hear, well, secretary mattis had to come out of an important meeting. >> that's right, sean. and i have spoken to several very senior leaders here in the pentagon tonight who have welcomed what they're