And as Ben Wedeman explains, this attack is making what was already a tense situation even worse.

Ben Wedeman解释说，这次袭击使埃及原本紧张的形势更加严重。

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CNN's Ben Wedeman said drivers had to dodge piles of rubble in the streets.

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CNN's Ben Wedeman reported from Vatican City and Ben Brumfield reported and wrote from Atlanta.

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CNN's Hada Messia and Ben Wedeman reported from Rome, and Laura Smith-Spark wrote from London.

CNN: February 23, 2013 -- Updated 1735 GMT (0135 HKT)