Israel has begun the first stages of its controversial offensive on Gaza city. The Israeli government believes it is one of the last Hamas strongholds, and where the remaining hostages are thought to be held. It's also where tens of thousands of starving and desperate Palestinians are trapped. About 60,000 reserve troops have been called up and are poised on the outskirts of the city. The plan has triggered growing condemnation both internationally and within Israel itself. Correspondent in Tel Aviv, Blake Sifton spoke to Lisa Owen.
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