The Arrow system has been successful in several tests against SINGLE targets under ideal conditions. Multiple targeting capabilities is still a distant wish of the system's designers. And, as was pointed out, no system is perfect and there will always be the possibility of a "leaker" target getting through the defensive screen. Considering that one Scud-type missile carrying botulinus could conceivably contaminate an area in excess of 1400 square miles, and given the area of Israel at roughly 7900 square miles, the successful penetration of several of these leakers could result in tens of thousands of Israeli casualties. Someone else mentioned that it would be far wiser for Israel to seek peace with its neighbors than spend billions of dollars on a defensive system that cannot provide complete protection from a missile attack. When one contemplates the possibility that these incoming leakers could be nuclear-tipped, the search for peace becomes all the more urgent.
U.S. Democratic Sen. Bill Nelson announces support for Iran nuclear deal (Haaretz)
from the article: An alibi for the Arrow