We officially live in the age of missile defense. The US-Israeli war against Iran has been the showcase for missile-defense systems — interceptors, radars, and complex command and control — that are extremely robust and have largely defanged Iran’s foremost military threat to Israel, American forces and other countries around the region. If not for these defensive systems, the United States and Israel probably wouldn’t have dared launch this military campaign — or at the very least would have done so knowing that Iran could exact an enormous cost on Israeli civilians and allied military forces. We’ve seen the toll...