Then it would be a fine thing if Israel had a missile defence system. The more Israel can convince her enemies that military action against her is futile, the safer she will be. There's a cost/benefit equation to run, but even a defence of uncertain effectiveness would be better than no defence system at all. As to firing off million-dollar ABM's at Katyushas -- well, Hezbollah could probably bankrupt Israel that way. You might as well start thinking of launching computer-guided interceptors at rocks come the next intifada.
Four Libyan soldiers said killed in battle with Islamists in Benghazi (Reuters)
from the article: An alibi for the Arrow