Why The Bombers Keep Coming

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And a new generation of young men has its own battle scars to avenge. A friend named Hassan offers that while Osama Bahar was in prison, Israeli interrogators hung him by his arms from the ceiling, spat in his face and mocked Islam. (Israeli authorities had no comment.) Says Hassan: "He always said he would avenge the mistreatment." In the case of grudges like that, a beard is optional.

--By David Van Biema. Reported by Jamil Hamad/Abu Dis, Azadeh Moaveni/Tehran, Amany Radwan/Cairo and Matt Rees/Jerusalem