Iran and Saudi Arabia were already in opposing camps regarding a solution to Syria's civil war. A UN envoy is trying to keep the process on track.
Despite stories of escapees, women are joining the Islamic State at an exponential rate. An Austrian teen was reportedly killed recently when she tried to escape.
The fate of the two pilots who ejected from the downed plane is unclear. Turkey had objected last week that Russia was bombing Turkmen rebels in Syria.
The Metrojet jet was downed over Egypt's Sinai Peninsula on Oct. 31, an attack claimed by Islamic State. Russian officials say there is growing consensus with Western powers on fighting Islamist terrorism.