The Iron Dome is an Israeli mobile all-weather air defense system developed by Rafael Advanced Defense Systems and Israel Aerospace Industries. It is designed to intercept and destroy short-range rockets and artillery shells fired from distances of 4 kilometers (2.5 miles) to 70 kilometers (43 miles) away and whose trajectory would take them to an Israeli populated area. The system became operational in March 2011 and performed its first interception of a rocket from Gaza in April 2011. The Iron Dome has three central components: Detection & Tracking Radar, Battle Management & Weapon Control, and Missile Firing Unit. The radar system is built by Elta, an Israeli defense company and subsidiary of Israel Aerospace Industries, and by the IDF. The control center is built for Rafael by mPrest Systems, an Israeli software company. The Iron Dome is part of Israel’s Missile Defense Organization (IMDO), which has several other systems. The system has a high success rate, with a reported 96% success rate. The Iron Dome is supposed to be able to determine if a rocket is on course to hit an area that is populated, and if it is not, then the rocket is ignored.