Russia and the West must build trust to carefully craft political solution for Syria
Just when we all might be thinking that the Syria imbroglio cannot get worse, a Russian bomber is shot down by Nato member Turkey.
Verbal missiles of mutual accusation and denial fly to and fro between Moscow and Ankara.
It's no surprise that Turkey and Russia have had this dangerous military exchange. Turkey has been annoying its Nato allies by being far too easy on Isil for all sorts of reasons, not least its tough eye on the national ambitions of the region's Kurds.