IAF's new Arrow interceptor

The air force will take delivery of a new and improved Arrow missile interceptor in the coming weeks as it continues to bolster its defenses in face of Iran's pursuit of a nuclear weapon. The upgraded interceptor is called "Block 4" and contains new software aimed at improving the system's ability to defend against long-range ballistic missiles. The Arrow is Israel's upper tier missile defense system, complemented by the Iron Dome for short-range rockets and the David's Sling, which is under development and to be used against medium-range rockets and cruise missiles.