How did Israel not know about Hamas's attack?
Yolande Knell: In the past, Israel's military has opened up its control centre for surveillance of Gaza to journalists, and it's clear that it has excellent real-time information about movements on the ground from drones and other cameras. It also has a vast network of informants. We saw in May's fighting with Islamic Jihad just how accurate Israel's information on the whereabouts of leading militants could be. (Cont.)