Vast crowds of pilgrims have turned out for the fourth day of the annual hajj in Saudi Arabia.
This despite fears about the spread of the H1N1 flu. Many pilgrims and security forces have been seen wearing face masks. An estimated two million people took part in the stoning of walls that represent the devil in the valley of Mina, outside the holy city of Mecca. Muslims around the world are celebrating Eid al-Adha, the most important holiday of the Islamic calendar. This event has been the scene of disaster in the past, with a deadly stampede claiming 362 lives in 2006. Authorities have introduced numerous security measures to try to ease the flow of pilgrims