Saudi King Salman bin Abdulaziz (R) escorts Qatar's Emir Sheikh Tamim bin Hamad al-Thani during a welcoming ceremony at the King Khalid International airport in Riyadh, on November 10, 2015. Arab leaders and top officials from South America are converging on Saudi Arabia for a summit aiming to strengthen ties between the geographically distant but economically powerful regions. AFP PHOTO / FAYEZ NURELDINE        (Photo credit should read FAYEZ NURELDINE/AFP/Getty Images)