Muslim pilgrims gather at the Jabal Al Rahma holy mountain, or the mountain of forgiveness, at Arafat for the annual hajj pilgrimage outside the holy city of Mecca, Saudi Arabia, Monday, Aug. 20, 2018. More than 2 million Muslims have begun the annual hajj pilgrimage. The five-day pilgrimage represents one of the five pillars of Islam and is required of all able-bodied Muslims once in their life. (AP Photo/Dar Yasin)