The math behind the war: Can Israel's air defense keep up against Iranian attacks?

Iranian missiles aimed at targets in Israel pass through the sky of Hebron, West Bank on June 18 as Israeli air defense system tries to intercept them.

There's a specific kind of math that could determine just how much longer the war can go — how many long-range missiles Iran has versus how many missile interceptors Israel has to shoot them down.

(Image credit: Mosab Shawer)