what more have we learned and what more can you tell us about the call between president trump and president erdogan. what led up to the move? >> my colleague and i were trying to figure out why this call happened on sunday. we didn't hear much from the u.s. until late sunday evening that the call had even happened. it turns out there was supposed to be a one-on-one meeting with president trump and president erdogan at the u.n. general assembly last month and it didn't happen. president erdogan on turkey made it clear he was upset about that. the only time he saw president trump was in a large reception towards the end of the week. that being known, president trump, the white house, they set up this call which occurred sunday afternoon -- sunday eastern time. the surprising thing, of course, was not that they had this call but what came out of it. it's no surprise that the kurks have wanted to move into syria. in the last several weeks it's become increasingly career according to u.s. military