You can argue that "Iron Dome is XXX%" effective all day, but it is a layer. Just like infosec, security is best in layers.<p>That is why there are also things like the TROPHY system for Israel's Merkava tanks or lighter APC like vehicles:<p><a href="http://www.youtube.com/watch?v=4eCUCBS1SVk" rel="nofollow">http://www.youtube.com/watch?v=4eCUCBS1SVk</a><p><a href="http://en.wikipedia.org/wiki/Trophy_(countermeasure)" rel="nofollow">http://en.wikipedia.org/wiki/Trophy_(countermeasure)</a><p>Israel is no stranger when it comes to rocket threats and has multiple countermeasures. So far, it seems to work pretty well overall when you look at the number of Israeli casualties due to incoming rocket fire. For the number of shots fired into the country, it is remarkably low even with the horrible accuracy of the rockets being fired.