“Combat in built-up areas is a challenge,” said IDF Chief of Staff Lt. Gen. Benny Gantz on a visit Sunday to the army reservists continuing to arrive at jumping-off points outside the Gaza Strip for possible ground action. The general gave the men some advice: “When you go in, put Sderot, Ofakim and Ashkelon behind you. Look forward.”
 Netanyahu said earlier that Israel is ready for a significant expansion of its Gaza offensive. President Obama: The next 24, 36, 48 hours are crucial.