What is up with that? Maybe these were Israeli reservists (you know, the ones who don't support the brutality against the Palestinians) who just didn't have the heart to pursue. Either that, or this assassin was a pro, trained at a terrorist camp and awfully good at what he did.
Either way, this is more serious event than suicide bombing. This will make those at the receiving end more powerless than being hit by suicide bomber where at least bomber dies. Pali's low grade skill is improving steadily. At some point, Israel has to hit them back before West Bank is full of thousands of improved terrorists. But America has her own war schedule which she does not want to be upset by Israeli's pressing need. But stiffing Sharon indefinitely is untenable. Bush and Sharon have to talk and work out some plans which will satisfy both. No, I am not talking about peace talks. That one does not fly now.
The CIA trained the Palestinian Intelegence Services in the art of sniping as part of Clintoons Peace deal. I never understood how sniping could viewed as peace making. Obviously Clintoon has a different meaning for the word "peace" and trained the Arabs in it.