Mohammed Bin Salman

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Mohammed bin Salman (Associated Press)

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Saudi Crown Prince Mohammed bin Salman (Associated Press) **FILE**

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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)

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In this Wednesday, June 21 , 2017 photo released by Al-Ekhbariya, Mohammed bin Salman, newly appointed as crown prince, left, kisses the hand of Prince Mohammed bin Nayef at royal palace in Mecca, Saudi Arabia. Saudi Arabia's King Salman on Wednesday appointed his 31-year-old son Mohammed bin Salman as crown prince, placing him first-in-line to the throne and removing the country's counterterrorism czar and a figure well-known to Washington from the line of succession. (Al-Ekhbariya via AP)

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FILE -- In this April 5, 2017 file photo, released by the Saudi Press Agency, SPA, Saudi King Salman, right, and Defense Minister and Deputy Crown Prince Mohammed bin Salman wave as they leave the hall after talks with the British prime minister, in Riyadh, Saudi Arabia. Saudi King Salman has put his 31-year-old son, Mohammed bin Salman, next in line to take over the oil-rich kingdom with a royal decree Wednesday. (Saudi Press Agency via AP, File)

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FILE - In this May 14, 2012 file photo, Prince Mohammed bin Salman waits for Gulf Arab leaders ahead of the opening of Gulf Cooperation Council summit, in Riyadh, Saudi Arabia. Saudi King Salman has put his 31-year-old son, Mohammed bin Salman, next in line to take over the oil-rich kingdom with a royal decree Wednesday. Here’s a look at other major royal figures in the history of the ultraconservative Sunni kingdom that’s a longtime U.S. ally and major oil producer.(AP Photo/Hassan Ammar, File)

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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)

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In this Wednesday, June 21 , 2017 photo released by Al-Ekhbariya, Mohammed bin Salman, newly appointed as crown prince, left, kisses the hand of Prince Mohammed bin Nayef at royal palace in Mecca, Saudi Arabia. Saudi Arabia's King Salman on Wednesday appointed his 31-year-old son Mohammed bin Salman as crown prince, placing him first-in-line to the throne and removing the country's counterterrorism czar and a figure well-known to Washington from the line of succession. (Al-Ekhbariya via AP)