Members of the Irshad Learning Center in Naperville, Illinois, gather to commemorate Ashura. Members of Irshad Learning Center are first and second generation Iranian Shi'as living in the United States. For the majority of Shi'a Muslims, Ashura marks the climax of the Remembrance of Muharram and commemorates the death of Imam Husain ibn Ali, the grandson of Prophet Muhammad at the Battle of Karbala on 10 Muharram in the year 61 AH. Mourning for Imam Husain and his companions by his surviving relatives and supporters began almost immediately after the Battle of Karbala. (Source: Wikipedia).