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Pro-army tribesmen man a checkpoint on a road leading to Lawdar town in the southern Yemeni province of Abyan June 19, 2012. Al Qaeda-linked militants retreated from Lawdar last month after encountering stiff resistance from pro-army tribal fighters, who have arranged themselves into popular committees to defend their town against attempts by the militants to control it. Yemen's army recaptured the last al Qaeda stronghold in restive Abyan province on Friday in a major advance in its U.S.-backed offensive to drive militants from towns across the south of the country. REUTERS/Khaled Abdullah