doesn't add up. that never happens. those are the things they want clarified. and they said, no problem. we'll go ahead and ratify this as long as we're satisfied with the answers. >> thank you very much, john. and he will get right back on that call. just so many crucial questions raise there'd. i want to get back to our special coverage of the president's either syria. in an hour and a half, he will make his case to the american people. a case that has changed dramatically in the past 24 hours. the president says diplomacy, not strikes, could be the way to go. and in another stunning about face, syria, of course, is now saying it is actually on board with the plan. willing to turn over its chemical weapons to the international communicate. but the devil is in the details. and there are some very serious devils here. jessica yellin joins me. the president said he would strike. then he asked congress to vote. now he seems to be tentatively embracing a deal that doesn't involve striking but brings in the u.n.