What COUNTRY saw a shakeup to its royal line of succession when Mohammed bin Salman bin Abdulaziz was named crown prince in place of the current king's nephew, Mohammed bin Nayef bin Abdulaziz, who was given the title in 2015? (edited at 11:27 pm, June 25, 2017 (EDT))
Original question: What COUNTRY saw a shakeup to its royal line of succession when Mohammed bin Salman bin Abdulaziz was named crown prince in place of the current king's cousin, Mohammed bin Nayef bin Abdulaziz, who was given the title in 2015?
Saudi Arabia