A key bit of evidence that emerged in the investigation of the Paris terror attacks, which saw at least 129 people killed on Friday, is a supposed Syrian passport found near the body of one of the slain assailants. It bore the name of a Syrian national who apparently transited through Greece in early October. The document seemed to be an important clue in the untangling of the terror plot.
But more than that, it sparked a larger debate: Could one of the terrorists have been a Syrian refugee?
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