Muslim Pilgrims pray at the birthplace of prophet Mohammed at the Grand Mosque, Islam's holiest shrine in Mecca, Saudi Arabia on December 4, 2008. 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)