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RIYADH, SAUDI ARABIA - MAY 21: In this handout photo provided by the Palestinian Press Office, U.S. President Donald Trump joins Saudi Arabia's King Salman bin Abdulaziz al-Saud and other Arab leaders at a summit meeting May 21, 2017 in Riyadh, Saudi Arabia. (Photo by Thaer Ghanaim/PPO via Getty Images)

RIYADH, SAUDI ARABIA - MAY 21: In this handout photo provided by the Palestinian Press Office, U.S. President Donald Trump joins Saudi Arabia's King Salman bin Abdulaziz al-Saud and other Arab leaders at a summit meeting May 21, 2017 in Riyadh, Saudi Arabia. (Photo by Thaer Ghanaim/PPO via Getty Images)