Istanbul - One of the world's most volatile regions was roiled further Tuesday when Turkey shot down a Russian warplane near the Turkish-Syrian border. Turkey said it hit the plane after it violated Turkey's airspace and ignored ten warnings.
CNN: Putin calls jet’s downing ‘stab in the back’; Turkey says warning ignored

Turkish President Recep Tayyip Erdogan (L) greets Russian President Vladimir Putin as he officially arrives for the G20 summit in Antalya, Turkey, Nov. 15, 2015.