<sod >The king of Saudi Arabia has appointed his son Mohammed bin Salman as crown prince, a move which replaces his nephew, Mohammed bin Nayef, who was previously first in line to the throne.< eod>< sod > The king of Saudi Arabia has appointed his son Mohammed bin Salman as crown prince, making him first in line to the throne at the expense of his nephew, Mohammed bin Nayef, a well known counterterrorism figure.< eod>