Alternative title: physicists assume the moment plane is hit by missile, all inputs are instantly frozen and all control completely lost.

This is not physics, it's basic fact checking. The land is 2km wide, of course the Turkish fighter didn't have time to notice the intrusion, establish radio contact, perform a sideway warning show then down the plane.

However, they may have warned 10 different Russian planes in5 minutes. The intrusion may have been a repeated act. The Russian may have been provoking the reaction. It seems like we won't know. Would the solution be to change the border to a straight line and connex area, instead of a Turkish valley inside a Syrian mountain?

I liked Obama's reaction when he said Russia was too busy killing the rebels instead of Daesh.