Turkey has been one of the most vocal opponents against Bashar al-Assad during the civil war going on in Syria. They've pressed for sanctions, etc., and it's long been suspected that if any military manoeuvres against Syria were to take place, Turkey would be heavily involved. It's been also suspected for awhile now that Syria has been purposely raising ethnic tensions in Turkey and along its border.
It now appears Syria has shot down a Turkish war jet.
http://www.hurriyetdailynews.com/tur...&NewsCatID=338
http://www.aljazeera.com/news/middle...721460173.html
It will be interesting to see how this turns out.