In this May 14, 2012, file photo, then Crown Prince Salman bin Abdul-Aziz Al Saud, left, speaks with his son Prince Mohammed as they wait for Gulf Arab leaders ahead of the opening of Gulf Cooperation Council, also known as GCC summit, in Riyadh, Saudi Arabia. Saudi Arabia's King Salman on Wednesday, April 29, 2015, removed his half-brother from the post of crown prince and named his nephew, the country's Interior Minister, in his place. (AP Photo/Hassan Ammar, File)