NERO
All Star
Russians play chess, not tic-tac-toe. Their response will be subtle yet strong. It could be that Turkey offers a public shaming by allowing a retaliatory attack on a wayward aircraft of their own or perhaps a russian bombing run on the Turkmen in Syria which would help Putin save face. There might even be the unexplained disappearance of a dignitaries family member(S) which is definitely in the style of the Putin. His pride is in his image of tough action. Between the downed passenger jet in egypt, accusations from the west over dubious target selection in Syria and now this, he is looking ineffectual. They will retaliate but not by launching on Istanbul.

Kidnapping an Ergodan?
Putin's best and IMO most likely move is to present unarguable proof of the existence and depth of the connection between Turkey and ISIS. He made the claim, now he has to prove it. If he does, he will force all the NATO members to respond to it and punish Turkey for him, while also making much more effective strides in cornering and destroying ISIS. Only hangup is his propaganda machine only works inside Russian borders.


