flew into their airspace. we also know the pilots seemed to have ejected from the video that's being shown by russian tv. russia has already claimed that it was not in turk irairspace. russia also claims it was shot down by a land artillery piece which seems ludicrous right now. we know there have been incursions into the turkish airspace. turkey has warned not to do it. this is a premonition we've had based on russia crossing over international borders on several occasions and almost thumbed their nose at the turks. >> hasn't turkey said the coalition fighting isis could use their airspace? >> not yet. they haven't given that permission to russia. in fact, they warned russia multiple times to stay out of their airspace. what compounds this issue is the fact that turkey obviously is a nato country as well.