A journey through Hajj, Islam's special pilgrimage

Updated 1341 GMT (2141 HKT) August 20, 2018

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(CNN)For the 1.8 billion Muslims around the world, the Hajj is considered a spiritual pinnacle. Each year, up to three million pilgrims descend on Mecca -- the epicenter of the Muslim world -- to seek redemption, to forgive and to be forgiven.