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This is a locator map for Saudi Arabia with its capital, Riyadh. (AP Photo)

This is a locator map for Saudi Arabia with its capital, Riyadh. (AP Photo)

FILE - Saudi Crown Prince Mohammed bin Salman arrives to meet then-Prime Minister Theresa May outside 10 Downing Street in London, on March 7, 2018. (AP Photo/Alastair Grant, File)

FILE - Saudi Crown Prince Mohammed bin Salman arrives to meet then-Prime Minister Theresa May outside 10 Downing Street in London, on March 7, 2018. (AP Photo/Alastair Grant, File)