Muslim pilgrims arrive to cast stones at a pillar, symbolizing the stoning of Satan, in a ritual called "Jamarat," a rite of the annual hajj, in Mina near the holy city of Mecca, on September 1, 2017. Muslims around the world are celebrating Eid al-Adha, the "Feast of Sacrifice", which marks the end of the annual pilgrimage or hajj to the Saudi holy city of Mecca and in remembrance of Abraham's readiness to sacrifice his son to God. Photo by Mohammed Hassan