A Muslim pilgrim stands near the Heera cave on Jebel al-Noor, Mount of Light, as he prays above the city of Mecca, Saudi Arabia on December 5, 2008. The Heera cave is where Muslims believe Prophet Mohammed received the revelation of the Koran. More than two million Muslims head to the holy city of Mecca, Saudi Arabia to make the annual Hajj pilgrimage. All fit and financially able Muslims are expected to perform the Hajj at least once in their life. (UPI Photo/Mohammad Kheirkhah)