BEIRUT (AP) — Shiite Muslims around the world on Thursday marked Ashoura , a holy day symbolizing sacrifice and martyrdom that holds special significance for many this year after months of war in Iran and Lebanon. Ashoura commemorates the martyrdom of Imam Hussein, grandson of the Prophet Muhammad, at the Battle of Karbala in 680 A.D. Imam Hussein was killed with his family and companions after refusing to pledge allegiance to the Umayyad caliphate. The event cemented the schism between Sunni