Muslim pilgrims leave the plains of Arafat outside the holy city of Mecca December 7, 2008. More than two million Muslims began the haj pilgrimage on Saturday, heading to a tent camp outside Mecca to follow the route Prophet Mohammad took 14 centuries ago. REUTERS/Saudi Press Agency/Handout (SAUDI ARABIA). FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS.