As Israel braces for possible war with Iran and its proxies, a new kind of conflict in which the civilian population will be a primary target for massive missile barrages, there are growing concerns about the military's ability to shield cities as well as its key bases. In the 34-day 2006 war Israel fought with Hezbollah of Lebanon, Tehran's main surrogate in the Levant, the Shiite movement fired some 4,000 rockets, supplied by Iran and Syria, into Israel as far south as the port city of Haifa, at a rate of around 150 per day. That was the deepest Hezbollah...