By Yoram Ettinger The U.S. does not give foreign aid to Israel — the U.S. makes an annual investment in Israel, one that provides the American taxpayer a return on investment of several hundred percent. Is that a valid statement? While Israel is a grateful recipient of several hundred U.S. military systems, it also serves as a battle-tested, cost-effective laboratory for the U.S. defense and aerospace industries, which employ — directly and indirectly — 3.5 million Americans. Moreover, the Israel Defense Forces serve as a laboratory for the U.S. military itself, which enhances U.S. performance on the battlefield. By serving...