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Photo by: Hassan Ammar

Muslim pilgrims cast stones at a pillar, symbolizing the stoning of Satan, in a ritual called "Jamarat," the last rite of the annual hajj, in Mina near the Saudi holy city of Mecca, Saudi Arabia in Mecca, Saudi Arabia, Thursday, Nov. 18, 2010. The annual Islamic pilgrimage draws 2.5 million visitors each year, making it the largest yearly gathering of people in the world. (AP Photo/Hassan Ammar)

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