Muslim pilgrims gather at the Kaaba

Thousands visit Islam's holiest site which stands in the centre of Makkah's Grand Mosque
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Muslim pilgrims perform the walk around the Kaaba (Tawaf) at the Grand Mosque in the Saudi holy city of Mecca early morning on November 9, 2010 (AFP/Getty Images)
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Muslim pligrims walk between Marwa and Safa hills in the Kaaba at the Grand Mosque in the Saudi holy city of Mecca on November 9, 2010. (AFP/Getty Images)
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Muslim pilgrims sleep inside the Kaaba at the Grand Mosque in the Saudi holy city of Mecca (AFP/Getty Images)
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Muslim pilgrims touch the wall of the Kaaba during the circle around the Kaaba (Tawaf) at the Grand Mosque in the Saudi holy city of Mecca on November 9, 2010 (AFP/Getty Images)
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The Kaaba, Islam's holiest site which stands in the centre of Mecca's Grand Mosque, contains the holy Black Stone which is believed to be the only piece remaining from an altar built by Abraham (AFP/Getty Images)
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Muslim pilgrims perform the walk around the Kaaba (Tawaf) at the Grand Mosque in the Saudi holy city of Mecca early morning on November 9 (AFP/Getty Images)
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Muslim pilgrims sleep outside the Kaaba at the Grand Mosque in the Saudi holy city of Mecca on November 9, 2010. The Kaaba, Islam's holiest site which stands in the centre of Mecca's Grand Mosque, contains the holy Black Stone which is believed to be the only piece remaining from an altar built by Abraham. (AFP/Getty Images)
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Muslim pilgrims perform the walk around the Kaaba (Tawaf) at the Grand Mosque in the Saudi holy city of Mecca early morning on November 9, 2010. The Kaaba, Islam's holiest site which stands in the centre of Mecca's Grand Mosque, contains the holy Black Stone which is believed to be the only piece remaining from an altar built by Abraham. (AFP/Getty Images)
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Elderly and walk-impaired Muslim pilgrims circle in their wheelchairs around the Kaaba as they perform Tawaf at the Grand Mosque in the Saudi holy city of Mecca early morning on November 9, 2010. The Kaaba, Islam's holiest site which stands in the centre of Mecca's Grand Mosque, contains the holy Black Stone which is believed to be the only piece remaining from an altar built by Abraham. (AFP/Getty Images)
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Muslim pilgrims perform the walk around the Kaaba (Tawaf) at the Grand Mosque in the Saudi holy city of Mecca early morning on November 9, 2010. The Kaaba, Islam's holiest site which stands in the centre of Mecca's Grand Mosque, contains the holy Black Stone which is believed to be the only piece remaining from an altar built by Abraham. (AFP/Getty Images)