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'Mecca-hattan': Modern Face of Islam's Holiest City Revealed

As millions of Muslims streamed into Mecca for the annual hajj pilgrimage, they came to a city undergoing the biggest transformation in its history.
Image: TOPSHOTS-SAUDI-RELIGION-ISLAM-HAJJ
An aerial view shows the Clock Tower and the Grand Mosque in the holy city of Mecca, on October 5, 2014. MOHAMMED AL-SHAIKH / AFP - Getty Images