A billboard in Taif, Saudi Arabia, shows King Salman bin Abdul-Aziz Al Saud (center) flanked by his 31-year-old son, Mohammed bin Salman (right), and Prince Mohammed bin Nayef. The king appointed his son as his successor and first in line to the throne, stripping Nayef of the title of crown prince and ousting him from his powerful position of interior minister. (AP)
