The Iron Dome is the bottom layer of Israel’s missile defense, according to the country’s Missile Defense Organization (IMDO).There are at least 10 Iron Dome batteries in Israel, each equipped with a radar that detects rockets and then uses a command-and-control system that quickly calculates whether an incoming projectile poses a threat or is likely to hit an unpopulated area. If the rocket does pose a threat, the Iron Dome fires missiles from the ground to destroy it in the air.