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RIYADH, SAUDI ARABIA - MAY 21: (----EDITORIAL USE ONLY MANDATORY CREDIT - 'BANDAR ALGALOUD / SAUDI ROYAL COUNCIL / HANDOUT' - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----)US President Donald Trump, US First lady Melania Trump (2nd R), Saudi Arabia's King Salman bin Abdulaziz al-Saud (2nd L) and Egyptian President Abdel Fattah el-Sisi (L) put their hands on an illuminated globe during the inauguration ceremony of the Global Center for Combating Extremist Ideology in Riyadh, Saudi Arabia on May 21, 2017. (Photo by Bandar Algaloud / Saudi Royal Council / Handout/Anadolu Agency/Getty Images)

RIYADH, SAUDI ARABIA - MAY 21: (----EDITORIAL USE ONLY  MANDATORY CREDIT - 'BANDAR ALGALOUD / SAUDI ROYAL COUNCIL / HANDOUT' - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----)US President Donald Trump, US First lady Melania Trump (2nd R), Saudi Arabia's King Salman bin Abdulaziz al-Saud (2nd L) and Egyptian President Abdel Fattah el-Sisi (L) put their hands on an illuminated globe  during the inauguration ceremony of the Global Center for Combating Extremist Ideology in Riyadh, Saudi Arabia on May 21, 2017. (Photo by Bandar Algaloud / Saudi Royal Council / Handout/Anadolu Agency/Getty Images)

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US President Donald Trump (C-L) and Saudi Arabia's King Salman bin Abdulaziz al-Saud (C-R) stop for coffee, in the presence of First Lady Melania Trump (R), in the terminal of King Khalid International Airport following Trump's arrival in Riyadh on May 20, 2017. / AFP PHOTO / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

US President Donald Trump (C-L) and Saudi Arabia's King Salman bin Abdulaziz al-Saud (C-R) stop for coffee, in the presence of First Lady Melania Trump (R), in the terminal of King Khalid International Airport following Trump's arrival in Riyadh on May 20, 2017.
 / AFP PHOTO / MANDEL NGAN        (Photo credit should read MANDEL NGAN/AFP/Getty Images)

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RIYADH, SAUDI ARABIA - MAY 20: (----EDITORIAL USE ONLY MANDATORY CREDIT - 'BANDAR ALGALOUD / SAUDI ROYAL COUNCIL / HANDOUT' - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----) Saudi Arabia's King Salman bin Abdulaziz Al Saud (R) welcomes U.S. President Donald Trump (right 2) and his wife Melania Trump (right 3) prior to their meeting at Al-Yamamah Palace in Riyadh, Saudi Arabia on May 20, 2017. (Photo by Bandar Algaloud / Saudi Royal Council / Handout/Anadolu Agency/Getty Images)

RIYADH, SAUDI ARABIA - MAY 20:  (----EDITORIAL USE ONLY  MANDATORY CREDIT - 'BANDAR ALGALOUD / SAUDI ROYAL COUNCIL / HANDOUT' - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----) Saudi Arabia's King Salman bin Abdulaziz Al Saud (R) welcomes U.S. President Donald Trump (right 2) and his wife Melania Trump (right 3) prior to their meeting at Al-Yamamah Palace in Riyadh, Saudi Arabia on May 20, 2017. (Photo by Bandar Algaloud / Saudi Royal Council / Handout/Anadolu Agency/Getty Images)

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RIYADH, SAUDI ARABIA - MAY 21: (----EDITORIAL USE ONLY MANDATORY CREDIT - 'BANDAR ALGALOUD / SAUDI ROYAL COUNCIL / HANDOUT' - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----)US President Donald Trump (2nd L), US First lady Melania Trump (4th L), Saudi Arabia's King Salman bin Abdulaziz al-Saud (3rd L) and Egyptian President Abdel Fattah el-Sisi (L) listen a briefing during the inauguration ceremony of the Global Center for Combating Extremist Ideology in Riyadh, Saudi Arabia on May 21, 2017. (Photo by Bandar Algaloud / Saudi Royal Council / Handout/Anadolu Agency/Getty Images)

RIYADH, SAUDI ARABIA - MAY 21: (----EDITORIAL USE ONLY  MANDATORY CREDIT - 'BANDAR ALGALOUD / SAUDI ROYAL COUNCIL / HANDOUT' - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----)US President Donald Trump (2nd L), US First lady Melania Trump (4th L), Saudi Arabia's King Salman bin Abdulaziz al-Saud (3rd L) and Egyptian President Abdel Fattah el-Sisi (L) listen a briefing during the inauguration ceremony of the Global Center for Combating Extremist Ideology in Riyadh, Saudi Arabia on May 21, 2017. (Photo by Bandar Algaloud / Saudi Royal Council / Handout/Anadolu Agency/Getty Images)

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US President Donald Trump (3L), US First lady Melania Trump (2L), Saudi Arabia's King Salman bin Abdulaziz al-Saud (C), and Egypt's President Abdel Fattah el-Sisi (3R) pose for a group photo with other leaders of the Muslim world during the inauguration of the Global Center for Combating Extremist Ideology in Riyadh on May 21, 2017. / AFP PHOTO / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

US President Donald Trump (3L), US First lady Melania Trump (2L), Saudi Arabia's King Salman bin Abdulaziz al-Saud (C), and Egypt's President Abdel Fattah el-Sisi (3R) pose for a group photo with other leaders of the Muslim world during the inauguration of the Global Center for Combating Extremist Ideology in Riyadh on May 21, 2017. / AFP PHOTO / MANDEL NGAN        (Photo credit should read MANDEL NGAN/AFP/Getty Images)