An MIT professor on NPR radio earlier this evening reported that the Iron Dome missile defense systems has achieved a less than 5% success rate. Him or the article must be wrong, but who?
IIRC the MIT prof. only counted those that hit the missile head-on, not from behind or the side as there is the possibility of any onboard warhead surviving.
http://www.bbc.com/news/world-middle-east-21751766