Saudi Defence Minister Mohammed bin Salman (2nd L),  who is the desert kingdom's deputy crown prince and second-in-line to the throne, arrives at the closing session of the 4th Summit of Arab States and South American countries held in the Saudi capital Riyadh, on November 11, 2015. The summit is aimed to strengthen ties between the geographically distant but economically powerful regions.  AFP PHOTO / FAYEZ NURELDINE / AFP / FAYEZ NURELDINE        (Photo credit should read FAYEZ NURELDINE/AFP/Getty Images)