Annual pilgrimage of Hajj, 2019

Muslim pilgrims circumambulate around the Kaaba, the cubic building at the Grand Mosque, ahead of the Hajj pilgrimage in the Muslim holy city of Mecca, Saudi Arabia. The Hajj occurs once a year during the Islamic lunar month of Dhul-Hijja, the 12th and final month of the Islamic calendar year. (Photo: AP)

Hundreds of thousands of Muslim pilgrims prepares to pray outside Namira Mosque in Arafat during the annual hajj pilgrimage, near the holy city of Mecca, Saudi Arabia, Saturday, Aug. 10, 2019. More than 2 million pilgrims were gathered to perform initial rites of the hajj, an Islamic pilgrimage that takes the faithful along a path traversed by the Prophet Muhammad some 1,400 years ago. (Photo: AP)

Muslim pilgrims pray on a rocky hill known as Mountain of Mercy, on the Plain of Arafat, during the annual hajj pilgrimage, near the holy city of Mecca, Saudi Arabia. (Photo: AP)

Hundreds of thousands of Muslim pilgrims pray outside Namira Mosque in Arafat during the annual hajj pilgrimage, near the holy city of Mecca, Saudi Arabia. (Photo: AP)

Muslim pilgrims pray during sunrise on a rocky hill known as Mountain of Mercy, on the Plain of Arafat, during the annual hajj pilgrimage, near the holy city of Mecca, Saudi Arabia. (Photo: AP)

Muslim pilgrims touch the golden door of the the Kaaba, the cubic building at the Grand Mosque, ahead of the Hajj pilgrimage in the Muslim holy city of Mecca, Saudi Arabia. (Photo: AP)

A Muslim pilgrim prays in front of a pillar, where Islam's Prophet Muhammad is believed to have delivered his last sermon to tens of thousands of followers, on a rocky hill known as Mountain of Mercy, on the Plain of Arafat, during the annual hajj pilgrimage. (Photo: AP)

Muslim pilgrims surround a pillar where Islam's Prophet Muhammad is believed to have delivered his last sermon to tens of thousands of followers on a rocky hill known as Mountain of Mercy on the Plain of Arafat during the annual hajj pilgrimage near the holy city of Mecca, Saudi Arabia, Saturday, Aug. 10, 2019. (Photo: AP)

A Muslim pilgrim prays outside Namira Mosque in Arafat during the annual hajj pilgrimage, near the holy city of Mecca, Saudi Arabia. (Photo: AP)

Muslim pilgrims on a rocky hill known as Mountain of Mercy, on the Plain of Arafat, during the annual hajj pilgrimage, ahead of sunrise near the holy city of Mecca, Saudi Arabia. (Photo: AP)