josha landis, i would like to start with you first. we have seen cease fires come and.e you at all confident that this one is going to last? >> no, i'm not confident. this is really not about the cease fire holding. it's about turkey being involved with russia and iran and essentially letting the rebels know that a new page has been turned, that turkey cannot keep its -- cannot keep its door open to the rebels and it's closing the door and that they're going to have to fend for themselves in negotiations with the assad regime. >> brangham: andrew tabe-lurr, take that up. is it your sense that this will hold? are some positive this might be the beginning to have the end to have the war in syria? >> i'm also skeptical. i think it's impossible to tell. i think it's very interesting that, after the capture of aleppo and we were in this situation, i agree it's important turkey is involved and on this kind of level with the russians and the u.s. if the room, that's new territory. what's also interesting is by pausing now and going into diplomacy, i think it shows that the rus