Iranian pilgrims crossed Iran-Iraq borders on foot on Saturday, in order to arrive in Karbala on October 30th for the annual Shia pilgrimage of Arbaeen. Footage broadcast by Iranian state TV captured the pilgrims in Babylon Govornorate, where they resumed their journey. Pilgrims will have to walk for 82 kilometres (50 miles) before they reach Karbala. The Arbaeen pilgrimage to Karbala in Iraq... Еще is one of the largest religious gatherings in the world, marking the 40th day after the martyrdom of Imam Hussein in the seventh-century. Hussein is said to be the third Shia Imam and the Prophet Mohammed's grandson.