I don't believe that Israel attacking Iran is a good option. The differances between the Israeli raid on Iraq's Osiraq reactor in 1981 and the attacking Iran now are substantial. The distance is 50% greater, there would be no guarantee of surprise due to modern satelite and radar cover and Iran's program comprises many targets. Some of these targets are well protected. Also, Iran is much more powerful than Iraq and has a shahid mentality. Israel can probabably destroy Iran's weapon program and even a large number of Iran's missiles while they are being prepared for launch. However, this would leave an Iran with the technical knowledge and a much greater will to develop nuclear weapons. Also, Iran can use Syria and Hezbollah controled Lebanon to provide a base to drag Israel into a protracted border war. Whatever Israel starts, the Western Allies will have to finish so better that the Western Allies take the only option available to pressure Iran and that is a naval blockade of Iran.
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from the article: Barak tells Gates: All Iran options still on table