clarissa ward joins us from moscow. november of 2015, turkey shot down a russian plane on the turkish syria border. it was an su-24 fighter jet. there have been tensions over the last several years, not to mention going back decades between turkey and russia but as muhammed said, of late the two nations had been negotiating on these cease-fire attempts in aleppo. >> reporter: no, it's extraordinary how much the relationship between turkey and russia has improved since the shooting down of that plane which was possibly an all-time low. we have seen russia and turkey cooperating really quite closely and i should say much to the chagrin of many rebel forces in syria who have started to feel like perhaps turkey was selling them out as part of this rapprochement with russia. as muhammed mentioned, russia and turkey working very closely together trying to broker this aleppo evacuation deal. there's a big summit here in