I hope Turkey has conducted a thorough investigation of the downed Russia jet. I think Russia needs to review the information Turkey has regarding that act.
With diverse populations within Turkey there could be sabotage to any cooperation or effectiveness.
This is the worry of the Charismatic Daesh. There is no telling how loyal some may be to their homeland.
Once Syria and Iraq are rid of Daesh, there will still be a period of vigilance afterward, especially immediately afterwards.
What I heard yesterday regarding the Istanbul airport was the security measures were lowered over the years after the Iraq invasion by the USA. That proved to be a luxury Istanbul did not have.
The Fort Hood killer was radicalized by a former American Imam. It was before Daesh made itself known, but, here are issues in security because of this mess.
