Hajj Muslim pilgrimage (88 images)

A sea of Muslims circle seven times around the Ka'baa which Muslims believe was built by Prophet Abraham and his son Ismael, at the Grand Mosque, Islam's holiest shrine in Mecca, Saudi Arabia on December 9, 2008. More than two million Muslims head to the holy city of Mecca to make the annual Hajj pilgrimage. (UPI Photo/Mohammad Kheirkhah)

Muslim pilgrims pray around the Ka'baa which Muslims believe was built by Prophet Abraham and his son Ismael, at the Grand Mosque, Islam's holiest shrine in Mecca, Saudi Arabia on December 9, 2008. More than two million Muslims head to the holy city of Mecca to make the annual Hajj pilgrimage. (UPI Photo/Mohammad Kheirkhah)

An aerial view shows hundred of thousands of Muslim pilgrims circling seven times around the Ka'baa which Muslims believe was built by Prophet Abraham and his son Ismael, at the Grand Mosque, Islam's holiest shrine in Mecca, Saudi Arabia on December 9, 2008. More than two million Muslims head to the holy city of Mecca to make the annual Hajj pilgrimage. (UPI Photo/Mohammad Kheirkhah)

Saudi security officers monitor the valley of Mina through surveillance cameras in Mina valley,near Mecca, Saudi Arabia on December 9, 2008. More than two million Muslims head to the holy city of Mecca to make the annual Hajj pilgrimage. (UPI Photo/Mohammad Kheirkhah)