text: File photo - Saudi Defense Minister Mohammed Bin Salman Bin Abdul Aziz Al Saud (or MBS) seen during Gulf Summit in Riyadh, Saudi Arabia on April 22, 2016. Saudi Arabia's king has appointed his son Mohammed bin Salman as crown prince - replacing his nephew, Mohammed bin Nayef, as first in line to the throne. Prince Mohammed bin Nayef, 57, has been removed from his role as head of domestic security, state media say. Photo by Balkis Press/ABACAPRESS.COM