reporter: his hope returned briefly in 2018, woon turkish tr entered idlib. >> the syrian people seehat the only savior for them is turkey. maybe, a f years ago, they hoped that america would do that. reporter: today, those turkish troops are still there, but saleh says, they cannot save the people of idlib. >>oethe international community accept that all these people are killed just because they wanted their freedom, their dignity, their equality? i'm calling for the unitedt states, presidnald trump. please, please do something. i beg you. now, more than one million people are going to be exterminated. reporter: the u.s. supports turkey's military psence in ialib, and has called russ's involvement unacceptable. but last week, national security advisor robert o'brien ruled out any intervention. >>th the ide america must do something, i just find that todo be --'t even see that as being a real argument. what are we supposed to do to stop that? we're supposed to parachute in as a global policeman, and hold up a stop sign anday stop this turkey, stop this russia? reporter: so all that s