FILE - In this April 4, 2017, file picture Saudi boys pose in front of a huge billboard showing in the center, King Salman, with his 31-year-old son Mohammed bin Salman to the right, and Prince Mohammed bin Nayef to the left in Taif, Saudi Arabia. Salman appointed his son, who was until now the deputy crown prince and country's defense minister, as his successor and first in line to the throne. Salman stripped Mohammed bin Nayef of the title of crown prince and ousted him from his powerful position of interior minister. (AP Photo/Amr Nabil)