The annual pilgrimage to Mecca officially begins Aug. 30. Nearly 2 million Muslims have already arrived for Hajj, coming to worship in the city’s grand mosque.

HAJJ 2017
Muslim pilgrims perform prayers at the Grand Mosque in Saudi Arabia's holy city of Mecca on August 27, 2017, prior to the start of the annual Hajj pilgrimage. / AFP PHOTO / KARIM SAHIB

HAJJ 2017
This long exposure photograph shows Muslim pilgrims circumambulating the Kaaba, Islam's holiest shrine, at the Grand Mosque in Saudi Arabia's holy city of Mecca on August 27, 2017, prior to the start of the annual Hajj pilgrimage. / AFP PHOTO / KARIM SAHIB

HAJJ 2017
This long exposure photograph shows Muslim pilgrims circumambulating the Kaaba, Islam's holiest shrine, at the Grand Mosque in Saudi Arabia's holy city of Mecca on August 27, 2017, prior to the start of the annual Hajj pilgrimage. / AFP PHOTO / KARIM SAHIB

HAJJ 2017
Muslim pilgrims prepare to circumambulate the Kaaba, Islam's holiest shrine, at the Grand Mosque in Saudi Arabia's holy city of Mecca on August 27, 2017, prior to the start of the annual Hajj pilgrimage. / AFP PHOTO / KARIM SAHIB

HAJJ 2017
Muslim pilgrims perform prayers at the Grand Mosque in Saudi Arabia's holy city of Mecca on August 27, 2017, prior to the start of the annual Hajj pilgrimage. / AFP PHOTO / KARIM SAHIB

HAJJ 2017
Muslim worshippers perform the evening (Isha) prayers at the Kaaba, Islam's holiest shrine, at the Grand Mosque in Saudi Arabia's holy city of Mecca on August 25, 2017, a week prior to the start of the annual Hajj pilgrimage in the holy city / AFP PHOTO / BANDAR ALDANDANI

HAJJ 2017
Muslim pilgrims perform prayers at the Grand Mosque in Saudi Arabia's holy city of Mecca on August 27, 2017, prior to the start of the annual Hajj pilgrimage. / AFP PHOTO / KARIM SAHIB

HAJJ 2017
Saudi Red Crescent paramedics show to the press their emergency equipment on August 28, 2017, ahead of the start of the annual Hajj pilgrimage in the holy city of Mecca. / AFP PHOTO / KARIM SAHIB

HAJJ 2017
Saudi Red Crescent paramedics show to the press their emergency equipment on August 28, 2017, ahead of the start of the annual Hajj pilgrimage in the holy city of Mecca. / AFP PHOTO / KARIM SAHIB

HAJJ 2017
A Saudi Red Crescent helicopter takes off as paramedics shows to the press their emergency equipment on August 28, 2017, ahead of the start of the annual Hajj pilgrimage in the holy city of Mecca. / AFP PHOTO / KARIM SAHIB

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A Saudi Red Crescent helicopter prepares to land as paramedics shows to the press their emergency equipment on August 28, 2017, ahead of the start of the annual Hajj pilgrimage in the holy city of Mecca. / AFP PHOTO / KARIM SAHIB

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Iranian Muslim pilgrims wait at Jeddah airport in Saudi Arabia on August 27, 2017, prior to the start of the annual Hajj pilgrimage in the holy city of Mecca. / AFP PHOTO / KARIM SAHIB

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An Iranian Muslim pilgrim reads the Koran as she waits at Jeddah airport in Saudi Arabia on August 27, 2017, prior to the start of the annual Hajj pilgrimage in the holy city of Mecca. / AFP PHOTO / KARIM SAHIB

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Muslim pilgrims walk through a street in the holy Saudi city of Mecca, on August 29, 2017, on the eve of the start of the annual Hajj pilgrimage. / AFP PHOTO / KARIM SAHIB

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Muslim pilgrims wait for the prayer at the Grand Mosque in the holy Saudi city of Mecca, on August 29, 2017, on the eve of the start of the annual Hajj pilgrimage. / AFP PHOTO / KARIM SAHIB

HAJJ 2017
Muslim pilgrims perform prayers at the Grand Mosque in Saudi Arabia's holy city of Mecca on August 27, 2017, prior to the start of the annual Hajj pilgrimage. / AFP PHOTO / KARIM SAHIB

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A Muslim pilgrim prays in front of the Kaaba, the cubic building at the Grand Mosque, ahead of the annual Hajj pilgrimage in the Muslim holy city of Mecca, Saudi Arabia, Monday, Aug. 28, 2017. (AP Photo/Khalil Hamra)

HAJJ 2017
Muslim worshippers perform prayers around the Kaaba, Islam's holiest shrine, at the Grand Mosque in Saudi Arabia's holy city of Mecca on August 28, 2017, prior to the start of the annual Hajj pilgrimage in the holy city. / AFP PHOTO / KARIM SAHIB

HAJJ 2017
Muslim worshippers perform prayers around the Kaaba, Islam's holiest shrine, at the Grand Mosque in Saudi Arabia's holy city of Mecca on August 28, 2017, prior to the start of the annual Hajj pilgrimage in the holy city. / AFP PHOTO / KARIM SAHIB

HAJJ 2017
Muslim pilgrims pray at the Grand Mosque in the holy Saudi city of Mecca, on August 29, 2017, on the eve of the start of the annual Hajj pilgrimage. / AFP PHOTO / KARIM SAHIB

HAJJ 2017
Muslim pilgrims circumambulate around the Kaaba, the cubic building at the Grand Mosque, ahead of the annual Hajj pilgrimage in the Muslim holy city of Mecca, Saudi Arabia, Monday, Aug. 28, 2017. (AP Photo/Khalil Hamra)

HAJJ 2017
Muslim pilgrims circumambulate around the Kaaba, the cubic building at the Grand Mosque, ahead of the annual Hajj pilgrimage in the Muslim holy city of Mecca, Saudi Arabia, Monday, Aug. 28, 2017. (AP Photo/Khalil Hamra)

HAJJ 2017
Muslim pilgrims touch the Kaaba, the cubic building at the Grand Mosque, ahead of the annual Hajj pilgrimage in the Muslim holy city of Mecca, Saudi Arabia, early Monday, Aug. 28, 2017. (AP Photo/Khalil Hamra)

HAJJ 2017
Muslim pilgrims touch the Kaaba stone, the cubic building at the Grand Mosque, ahead of the annual Hajj pilgrimage in the Muslim holy city of Mecca, Saudi Arabia, early Monday, Aug. 28, 2017. (AP Photo/ Khalil Hamra)

HAJJ 2017
Muslim pilgrims circumambulate around the Kaaba, the cubic building at the Grand Mosque, ahead of the annual Hajj pilgrimage in the Muslim holy city of Mecca, Saudi Arabia, early Monday, Aug. 28, 2017. (AP Photo/Khalil Hamra)
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