Tunisian's president Beji Caid Essebsi, left, lays a wreath in memory of the victims of the terrorist attack at the Bardo Museum in Tunis, Sunday March 22, 2015. The two extremist gunmen who killed 21 people at a museum in Tunis trained in neighboring Libya before caring out the deadly attack, a top Tunisian security official said. (AP Photo/Ali Louati)
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