Egyptians discovered a massive weapons cache in Sinai which included 100 anti-aircraft rockets. Local Bedouins usually assist in such discoveries: the more shipments are intercepted, the more shipments Hamas will attempt, thus increasing the profits of Bedouin smugglers. (A part of the tribe which smuggles weapons for Hamas has migrated to the Negev and squats on the state land there.)
The interception of a hundred rockets suggests that Hamas has thousands of them. The rockets are good enough to keep Israeli helicopters out ofGazan airspace. Without helicopter cover, IDF won’t be able to send tanks into Gaza, and ground incursions will come to an end.