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Three rockets fell Thursday in the area around the Gaza Strip, one in the yard of a Sderot home - just a few reminders that Israel is still far from its declared goal in Operation Cast Lead. Discussion about the military operation's outcome revolves around the term "deterrence." If Israel can enshrine Cast Lead in a long-term agreement, the war will be remembered as a success. But fears are mounting that the operation's military achievements are dissipating. If so, the operation will go down in history as a less-than-successful round in a long war in the Gaza Strip. The Israel Defense Forces left Gaza with the feeling that it had proven itself, after its debacle in Lebanon in 2006. But it seems that the bottom line will have to wait. In Lebanon, too, it took several months before it could be concluded that although the IDF made mistakes, enough deterrence against Hezbollah was achieved to prevent renewed fighting. Barak, who was quick to criticize what went wrong in L...