A handout picture provided by the Saudi Royal Palace on February 12, 2019, shows Saudi Crown Prince Mohammed bin Salman (L) walking past the Hajar al-Aswad ("Black Stone"), believed to be the only piece remaining from an altar built by the patriarch Abraham, as he visits Islam's holiest shrine of the Kaaba ("The Cube") at the Grand Mosque in Saudi Arabia's holy city of Mecca, during his inspections of expansion at the site. (Photo by Bandar AL-JALOUD / Saudi Royal Palace / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / SAUDI ROYAL PALACE / BANDAR AL-JALOUD" - NO MARKETING - NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS