off, after president obama had created that channel. i think that was a mistake by president trump. if zarif, the foreign minister is in the united states now talking to american senators, that's positive. more important to talk to the secretary of state or someone representing the secretary of state, mike pompeo. you want to deliver a very tough and clear message to the iranians. about their drone activity, against our ships, against threats to take, to attack american ships. and what they've done in the last 48 hours, that's impound a commercial vessel. that's the best way to handle this. i don't think the iranians are looking for war. we are certainly not looking for war. but you also have to have a tough-minded approach to back them down a little bit and not be intimidated by them. >> joining us from the aspen security forum, ambassador nick burns, former u.s. ambassador to nato. heat wave, we'll tell you how dangerous the temperatures are expected to get after the