Men hold a banner during a gathering at the Trocadero place, in Paris, Sunday, Jan. 18, 2015 to protest against extremist Islamic group Boko Haram after a large-scale attack in Baga, where as many as 2,000 people were massacred in a raid on January 7, 2015. Cameroon, Chad and Niger have launched a regional bid to combat the Boko Haram. (AP Photo/Thibault Camus)
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