Iron Dome (Hebrew:‎ “kippat barzel”) is a mobile all-weather air defense system developed by Rafael Advanced Defense Systems and Israel Aerospace Industries.

The system is designed to intercept and destroy short-range rockets and artillery shells fired from distances of 4 kilometres (2.5 mi) to 70 kilometres (43 mi) away and whose trajectory would take them to an Israeli populated area.

Israel hopes to increase the range of Iron Dome's interceptions, from the current maximum of 70 kilometres (43 mi) to 250 kilometres (160 mi) and make it more versatile so that it could intercept rockets coming from two directions simultaneously.

Iron Dome was declared operational and initially deployed on 27 March 2011 near Beersheba.

On 7 April 2011, the system successfully intercepted a BM-21 Grad launched from Gaza for the first time.

On 10 March 2012, The Jerusalem Post reported that the system shot down 90% of rockets launched from Gaza that would have landed in populated areas.

By November 2012, official statements indicated that it had intercepted over 400 rockets.

By late October 2014, the Iron Dome systems had intercepted over 1,200 rockets.

In addition to their land-based deployment, Iron Dome batteries will in the future be deployed at sea on Sa'ar 6-class corvettes, where they will protect off-shore gas platforms in conjunction with Israel's Barak 8 missile system.

Iron Dome is part of a future multi-tiered missile defense system that Israel is developing, which includes Arrow 2, Arrow 3, Iron Beam, Barak 8 and David's Sling.

Source: Wikipedia