Tensions in the Middle East have not deterred millions of Shiite Muslims from participating in the annual Arbaeen pilgrimage. The event is being held in the Iraqi holy city of Karbala. The pilgrimage is a significant occasion, observed 40 days after Ashoura, and is one of the world's largest annual gatherings.

It commemorates the killing of Imam Hussein, a grandson of the Prophet Muhammad. Further details about the Arbaeen pilgrimage and the current situation in Iraq are available from KPRC 2 and Click2Houston.