Where does proxy war end -- and World War III begin?

Revisiting our conversation with veteran foreign correspondent Dexter Filkins

This week I am in Paris on work. Just before noon today, I heard air raid sirens. And it is a measure of the moment we live in that I genuinely wondered if it was just a drill.

It was, thankfully.

But in my conversations here in recent days, as I know is happening back home as well, the thought cannot be escaped: Are these wars that engulf us now moving b…