In this Nov. 11, 2015 file photo, Saudi Arabian Deputy Crown Prince Mohammed bin Salman attends a summit of Arab and Latin American leaders in Riyadh, Saudi Arabia. Saudi Arabia's second-in-line to the throne, Deputy Crown Prince Mohammed bin Salman, will meet President Donald Trump at the White House in the highest-level visit to Washington by a Saudi royal since November's presidential election. (AP Photo/Hasan Jamali, file)