aircraft. i think both sides will work hard to deconflict that. we have a deconfliction line in place. but it's monday you c, it's mur it's syria. >> and let's also bring in nick burns, he is professor of diplomacy and international relations at the kennedy school of government. good to have you on board. >> john heilemann has a question with for you. >> yeah, mr. ambassador, it's notable that this is not something that happens every day. we haven't had a u.s. shootdown of a hostile jet in around a decade i think. so again from a standpoint of again a casual observer, you look at that and you say is this a sign of some kind of escalation that is at work here or is this sort of a random kind of one off that no one should read too much into? >> i think it's indicative of a larger problem. syria is a relatively small country. you have the fighting forces of russia, iran, hezbollah and syrian government on wong side.