Muslims kiss the Black Stone of the Kaaba at the Grand mosque ahead of the annual Haj pilgrimage in Mecca, Saudi Arabia, August 26, 2017.

Muslims wait to kiss the Black Stone of the Kaaba at the Grand mosque ahead of the annual Haj pilgrimage in Mecca, Saudi Arabia, August 26, 2017.

Muslims pray at the Grand mosque ahead of the annual Haj pilgrimage in Mecca, Saudi Arabia August 29, 2017.

Muslims pray at the Grand mosque ahead of the annual Haj pilgrimage in Mecca, Saudi Arabia, August 29, 2017.

Muslims pray at the Grand mosque ahead of the annual Haj pilgrimage in Mecca, Saudi Arabia August 29, 2017.

Muslims pray at the Grand mosque ahead of the annual Haj pilgrimage in Mecca, Saudi Arabia, in this August 26, 2017 mobile phone image.

Muslim pilgrims circle the Kaaba at the Grand mosque ahead of the annual Haj pilgrimage, in Mecca, Saudi Arabia August 26, 2017.

Muslims touch the Kaaba at the Grand mosque ahead of the annual Haj pilgrimage in Mecca, Saudi Arabia, August 26, 2017.

Muslims wear protective masks as they wait to attend a prayer at the Grand mosque ahead of the annual Haj pilgrimage in Mecca, Saudi Arabia August 25, 2017. Picture taken August 25, 2017.

Muslims pray at the Grand mosque ahead of the annual Haj pilgrimage in Mecca, Saudi Arabia, in this August 26, 2017 mobile phone image.

Muslims pray at the Grand mosque ahead of the annual Haj pilgrimage in Mecca, Saudi Arabia, in this August 26, 2017 mobile phone image.

Muslims pray at the Grand mosque ahead of the annual Haj pilgrimage in Mecca, Saudi Arabia, August 28, 2017.

Muslims pray at the Grand mosque ahead of the annual Haj pilgrimage, in Mecca, Saudi Arabia August 26, 2017.

Muslims pray at the Grand mosque ahead of the annual Haj pilgrimage in Mecca, Saudi Arabia August 26, 2017. Picture taken August 26, 2017.