context: Iron Dome (Hebrew: כיפת ברזל) an air defense system with a mobile base, developed by Rafael Advanced Defense Systems, intended to intercept short-range missiles and artillery. In February 2007, the Israeli Minister of Defense, Amir Peretz, chose the Iron Dome system as a defensive solution to remove the danger of short-range missiles from Israel. [1] Since then, the development of the system, which cost $ 210 million in cooperation with the Israel Defense Forces, began to serve in Mid of 2011.
question: When did Israel build the Air Protection Dome?
answers.text: Mid of 2011