Pilgrims on Mt. Arafat, also known as Jabal al-Rahmah (Mount of Mercy), where the Prophet Mohammed is believed to have given his final sermon, in Mecca, Saudi Arabia on Aug. 31, 2017, ahead of the climax of the Hajj

Pilgrims on Mt. Arafat, also known as Jabal al-Rahmah (Mount of Mercy), where the Prophet Mohammed is believed to have given his final sermon, in Mecca, Saudi Arabia on Aug. 31, 2017, ahead of the climax of the Hajj

Pilgrims on Mt. Arafat, also known as Jabal al-Rahmah (Mount of Mercy), where the Prophet Mohammed is believed to have given his final sermon, in Mecca, Saudi Arabia on Aug. 31, 2017, ahead of the climax of the Hajj

Pilgrims on Mt. Arafat, also known as Jabal al-Rahmah (Mount of Mercy), where the Prophet Mohammed is believed to have given his final sermon, in Mecca, Saudi Arabia on Aug. 31, 2017, ahead of the climax of the Hajj

Pilgrims on Mt. Arafat, also known as Jabal al-Rahmah (Mount of Mercy), where the Prophet Mohammed is believed to have given his final sermon, in Mecca, Saudi Arabia on Aug. 31, 2017, ahead of the climax of the Hajj

Pilgrims on Mt. Arafat, also known as Jabal al-Rahmah (Mount of Mercy), where the Prophet Mohammed is believed to have given his final sermon, in Mecca, Saudi Arabia on Aug. 31, 2017, ahead of the climax of the Hajj

Pilgrims on Mt. Arafat, also known as Jabal al-Rahmah (Mount of Mercy), where the Prophet Mohammed is believed to have given his final sermon, in Mecca, Saudi Arabia on Aug. 31, 2017, ahead of the climax of the Hajj

Pilgrims on Mt. Arafat, also known as Jabal al-Rahmah (Mount of Mercy), where the Prophet Mohammed is believed to have given his final sermon, in Mecca, Saudi Arabia on Aug. 31, 2017, ahead of the climax of the Hajj

Pilgrims on Mt. Arafat, also known as Jabal al-Rahmah (Mount of Mercy), where the Prophet Mohammed is believed to have given his final sermon, in Mecca, Saudi Arabia on Aug. 31, 2017, ahead of the climax of the Hajj

Pilgrims on Mt. Arafat, also known as Jabal al-Rahmah (Mount of Mercy), where the Prophet Mohammed is believed to have given his final sermon, in Mecca, Saudi Arabia on Aug. 31, 2017, ahead of the climax of the Hajj

Pilgrims on Mt. Arafat, also known as Jabal al-Rahmah (Mount of Mercy), where the Prophet Mohammed is believed to have given his final sermon, in Mecca, Saudi Arabia on Aug. 31, 2017, ahead of the climax of the Hajj

Muslim pilgrims at the Namirah Mosque in Mecca, Saudi Arabia on Aug. 31, 2017, ahead of the climax of the Hajj.

Muslim pilgrims at the Namirah Mosque in Mecca, Saudi Arabia on Aug. 31, 2017, ahead of the climax of the Hajj.

Muslim pilgrims at the Namirah Mosque in Mecca, Saudi Arabia on Aug. 31, 2017, ahead of the climax of the Hajj.

Aerial view of pilgrims on Mt. Arafat, also known as Jabal al-Rahmah (Mount of Mercy), where the Prophet Mohammed is believed to have given his final sermon, in Mecca, Saudi Arabia on Aug. 31, 2017 ahead of the climax of the Hajj.

Aerial view of pilgrims on Mt. Arafat, also known as Jabal al-Rahmah (Mount of Mercy), where the Prophet Mohammed is believed to have given his final sermon, in Mecca, Saudi Arabia on Aug. 31, 2017 ahead of the climax of the Hajj.

Aerial view of pilgrims on Mt. Arafat, also known as Jabal al-Rahmah (Mount of Mercy), where the Prophet Mohammed is believed to have given his final sermon, in Mecca, Saudi Arabia on Aug. 31, 2017 ahead of the climax of the Hajj.

Aerial view of pilgrims on Mt. Arafat, also known as Jabal al-Rahmah (Mount of Mercy), where the Prophet Mohammed is believed to have given his final sermon, in Mecca, Saudi Arabia on Aug. 31, 2017 ahead of the climax of the Hajj.