Over the last few days the brewing Russo-Turkish conflict over events in Syria took a deadly turn. Turkish air-defenses shot down aRussian SU-24, that was conducting bombing runs in the Turkmen inhabited parts of northern Syria. Russia claims it was hitting ISIS(DAESH) targets, while Turkey has long claimed that the attacks hit anti-Assad Turkmen rebels. The two pilots bailed out of their burning aircraft, but one seems to have been shot dead by the Turkmens (technically a crime under international law) while the other has been rescued.
This military interstate dispute (MID) was bound to happen due to the opposition between President Erdogan of Turkey and President Putin of Russia over the policy each pursues in Syria, and due to the proximity of Russian military operations to Turkey. Many have voiced the fear of escalation that might lead to war.