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Massacre in Paris: What we know about the attackers

A clearer picture is beginning to emerge of how the violence unfolded and who was behind it.

People sing the French national anthem at Place de la Republique as France observes three days of national mourning for the victims of the terror attacks on Nov. 15, 2015 in Paris, France. (Photo by Jeff J Mitchell/Getty)
People sing the French national anthem at Place de la Republique as France observes three days of national mourning for the victims of the terror attacks on Nov. 15, 2015 in Paris, France. Getty Images