I am sure this was an accident (and nothing more than bad luck for MAS). Had Obama got on the phone to Putin: "Vladimir, we gotta get out heads together on this, what do you want to do?", it's just possible we might have seen some cooperation, at least enough to recover the bodies. Threats were never going to work. Putin doesn't have to do anything and Obama won't. I hope. It's a tragedy for the families but it's not the end of the world. Yet.