Iraqi Shi'ite Muslims commemorate Ashoura in Kerbala, southwest of Baghdad November 4, 2014. A gathering of millions of Shi'ite Muslims at shrines and mosques across Iraq for the Ashoura religious commemoration passed without any major attacks on Tuesday, under tight security imposed for fear of Islamic State bombers. REUTERS/Ahmed Saad (IRAQ - Tags - Tags: CIVIL UNREST POLITICS RELIGION)