CNN Live Updates includes information that 20 more trucks with humanitarian aid entered Gaza today, but are a drop in the bucket of what is needed. And the Israeli defence minister is telling troops to keep preparing.

Over the weekend I listened to an interview with a woman whose research specialty is the tunnels under Gaza. It seems there are hundred of miles of them and they run at various depths so the routes criss-cross. They connect with the basements of a lot of homes. Many are concrete lined and are sufficient that military equipment is stored in there, leaders sleep down there, as do a lot of the fighters. It makes me wonder if technology such as LIDAR are going to be used, if they would work that deep.