Iraqi Shiite Muslim pilgrims take part in a mourning event in Iraqâs southern city of Karbala marking the Arbaeen and flocking to the tomb of Hazrat Hussein and his brother Hazrat Abbas on September 28, 2021. Arbaeen is the last day of the 40-day mourning period that follows the anniversary of the killing of Prophet Mohammad's grandson, Hussein and his 72 companions, in the seventh century. (Photo by Karar Essa/Anadolu Agency via Getty Images)
