In this Wednesday, Sept. 9, 2015 photo, Muslim pilgrims circumambulate around the Kaaba, the cubic building at the Grand Mosque in the Muslim holy city of Mecca, Saudi Arabia. Thousands of Muslims from all over the world have arrived in Saudi Arabia for the annual hajj, or pilgrimage, to Mecca. Every Muslim is required to perform the hajj, or pilgrimage, to Mecca at least once in his or her lifetime if able to do so. (AP Photo/Amr Nabil)

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