Muslim pilgrims perform prayers during hajj

Over 2m Muslims from around the world flood Saudi city of Mecca to perform the annual Hajj pilgrimage, which is one of the five pillars of Islam
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Muslim pilgrims perform their prayers in the Grand Mosque of the holy city of Mecca, on October 22, 2012. Over two million Muslims from around the world flood Saudi city of Mecca to perform the annual Hajj pilgrimage, which is one of the five pillars of Islam. (AFP/Getty Images)
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Muslim pilgrims perform their evening prayers around the Kaaba in the Grand Mosque of the holy city of Mecca, on October 22, 2012. Over two million Muslims from around the world flood Saudi city of Mecca to perform the annual Hajj pilgrimage, which is one of the five pillars of Islam. (AFP/Getty Images)
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Muslim pilgrims perform their evening prayers, in Grand Mosque in the holy city of Mecca, on October 22, 2012. Over two million Muslims from around the world flood Saudi city of Mecca to perform the annual Hajj pilgrimage, which is one of the five pillars of Islam. (AFP/Getty Images)
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Muslim pilgrims perform their evening prayers, in Grand Mosque in the holy city of Mecca, on October 22, 2012. Over two million Muslims from around the world flood Saudi city of Mecca to perform the annual Hajj pilgrimage, which is one of the five pillars of Islam. (AFP/Getty Images)
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Muslim pilgrims walk around the holy Kaaba in the Grand Mosque of the holy city of Mecca, on October 22, 2012. Over two million Muslims from around the world flood Saudi city of Mecca to perform the annual Hajj pilgrimage, which is one of the five pillars of Islam. (AFP/Getty Images)
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Muslim pilgrims perform their prayers in the Grand Mosque of the holy city of Mecca, on October 22, 2012. Over two million Muslims from around the world flood Saudi city of Mecca to perform the annual Hajj pilgrimage, which is one of the five pillars of Islam. (AFP/Getty Images)
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Muslim pilgrims perform their evening prayers, in Grand Mosque in the holy city of Mecca, on October 22, 2012. Over two million Muslims from around the world flood Saudi city of Mecca to perform the annual Hajj pilgrimage, which is one of the five pillars of Islam. (AFP/Getty Images)
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Muslim pilgrims attend to perform their evening prayers, in Grand Mosque in the holy city of Mecca, on October 22, 2012. Over two million Muslims from around the world flood Saudi city of Mecca to perform the annual Hajj pilgrimage, which is one of the five pillars of Islam. (AFP/Getty Images)
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Muslim pilgrims leave Grand Mosque after performing their evening prayers in the holy city of Mecca on October 22, 2012. Over two million Muslims from around the world flood Saudi city of Mecca to perform the annual Hajj pilgrimage, which is one of the five pillars of Islam. (AFP/Getty Images)
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Muslim pilgrims leave the Grand Mosque after performing the evening prayers, in the holy city of Mecca, on October 22, 2012. Over two million Muslims from around the world flood Saudi city of Mecca to perform the annual Hajj pilgrimage, which is one of the five pillars of Islam. (AFP/Getty Images)