According to Strategy Page,
Israel is going ahead with installing the Iron Dome anti-rocket system. This is a defensive system with a unique twist. Iron Dome radars (there are two of them) quickly calculate the trajectory of the incoming rocket (Palestinian Kassams from Gaza, or Russian and Iranian designs favored by Hizbollah in Lebanon) and do nothing if the rocket trajectory indicates it is going to land in an uninhabited area. But if the computers predict a rocket coming down in an inhabited area, a $40,000 guided missile is fired to intercept the rocket. This makes the system cost-effective. That's because Hizbollah fired 4,000 rockets last year, and Palestinian terrorists in Gaza have fired over six thousand Kassam rockets in the past six years. But over 90 percent of these rockets landed in uninhabited areas.
Very clever, those Israelis.
RLC