Photo by: Hassan Ammar

Muslim pilgrims pray on a rocky hill called the Mountain of Mercy on the Plain of Arafat near the holy city of Mecca, Saudi Arabia, on Oct. 25, 2012. Saudi authorities say about 3.4 million pilgrims — some 1.7 million of them from abroad — have arrived in the holy cities of Mecca and Medina for this year's pilgrimage. (Associated Press)