Muslim pilgrims head to pray the Friday prayer inside the Grand Mosque, in Mecca, Saudi Arabia, Friday, Nov. 4, 2011. The annual Islamic pilgrimage draws three million visitors each year, making it the largest yearly gathering of people in the world. The Hajj will begin on November 5. (AP Photo/Hassan Ammar) *** Local Caption *** Mideast Saudi Arabia Hajj.JPEG-00a67.jpg