Devout Shiite pilgrims were left covered in blood as they struck themselves with swords and chains during the mourning procession to mark the day of Ashura in the holy city of Najaf. Ashura, on the 10th day of the mourning month of Muharram, commemorates the killing of the Prophet Mohammed's grandson Hussein at the Battle of Karbala in 680 AD - the defining moment of Islam's confessional schism. Typically, millions of Shiites from around the world flock to the golden-domed shrine where Hussein's remains are buried, to pray and cry, shoulder-to-shoulder. But with coronavirus numbers spiking across the globe, this...