A soldier mans a machine gun mounted on an armoured personnel carrier (APC) at a checkpoint in Sanaa May 13, 2014. Yemen is waging a U.S.-backed campaign to crush Al Qaeda in the Arabian Peninsula, the global jihadi network’s regional wing. AQAP has mounted dozens of attacks on government officials, security forces and foreigners in recent months. REUTERS/Khaled Abdullah (YEMEN – Tags: POLITICS CIVIL UNREST MILITARY)