Muslims perform the annual pilgrimage to Mecca. The pilgrimage is one of the five Pillars of Islam. All Muslims are expected to perform the Hajj at least once in their lifetime if they have the physical and financial capacity. About 6 million Muslims from over 70 countries journey to the holy city of Mecca in Saudi Arabia. In one of the rites of the Hajj, pilgrims move in a circular, counterclockwise procession around the Ka’bah.