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Trump (fifth from left); King Salman (fifth from right); Gen. Sheikh Mohammed bin Zayed Al Nahyan (third from left), the crown prince of Abu Dhabi; King of Bahrain Hamad bin Isa Al Khalifa (fourth from right); Kuwaiti Emir Sheikh Jaber al-Ahmad al-Sabah (fourth from left); Emir of Qatar Sheikh Tamim bin Hamad Al Thani (second from right); and Sayyid Fahd bin Mahmoud al Said (third from right), deputy prime minister of the Sultanate of Oman, are seen during the U.S.-Gulf Summit at King Abdul Aziz International Conference Center in Riyadh on May 21, 2017.