An aerial view shows Muslim pilgrims gathering at the Grand Mosque in the Saudi holy city of Mecca on October 22, 2012. Muslim pilgrims are descending in droves on Mecca for the hajj pilgrimage, the world’s largest annual gathering which Saudi Arabia insists will not be affected by instability rocking the region. AFP PHOTO/FAYEZ NURELDINE (Photo credit should read FAYEZ NURELDINE/AFP/Getty Images)