A handout picture provided by the Saudi Royal Palace on June 17, 2016 shows deputy crown prince and Minister of Defence, Prince Mohammed bin Salman (L) meeting with US President Barack Obama in Washington. / AFP PHOTO / Saudi Royal Palac AND AFP PHOTO / BANDAR ALGALOUD / === RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / HO / SAUDI ROYAL PALACE" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS ===BANDAR ALGALOUD/AFP/Getty Images