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Saudi Arabia's King Salman bin Abdulaziz al-Saud (front centre L) is greeted by Japan's Prime Minister Shinzo Abe (front) before their meeting at Abe's official residence in Tokyo on March 13, 2017. / AFP PHOTO / POOL / Shizuo Kambayashi (Photo credit should read SHIZUO KAMBAYASHI/AFP/Getty Images)

Saudi Arabia's King Salman bin Abdulaziz al-Saud (front centre L) is greeted by Japan's Prime Minister Shinzo Abe (front) before their meeting at Abe's official residence in Tokyo on March 13, 2017. / AFP PHOTO / POOL / Shizuo Kambayashi        (Photo credit should read SHIZUO KAMBAYASHI/AFP/Getty Images)

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BEIJING, CHINA - MARCH 16: Chinese President Xi Jinping (L) with Saudi Arabia's King Salman bin Abdulaziz Al Saud attend the Road to the Arab Republic - the closing ceremony of the artifacts unearthed in Saudi Arabia at China National Museum on March 16, 2017 in Beijing, China. (Photo by Lintao Zhang/Pool/Getty Images)

BEIJING, CHINA - MARCH 16:  Chinese President Xi Jinping (L) with Saudi Arabia's King Salman bin Abdulaziz Al Saud attend the Road to the Arab Republic - the closing ceremony of the artifacts unearthed in Saudi Arabia at China National Museum on March 16, 2017 in Beijing, China.    (Photo by Lintao Zhang/Pool/Getty Images)

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KUALA LUMPUR, MALAYSIA - FEBRUARY 27 : (----EDITORIAL USE ONLY MANDATORY CREDIT - "BANDAR ALGALOUD / SAUDI KINGDOM COUNCIL / HANDOUT" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----) King of Saudi Arabia Salman bin Abdulaziz Al Saud (L) delivers a speech after getting the title of honorary PHD from University of Malaya during his visit in Kuala Lumpur, Malaysia on February 27, 2017. (Photo by Bandar Algaloud / Saudi Kingdom Council / Handout/Anadolu Agency/Getty Images)

KUALA LUMPUR, MALAYSIA - FEBRUARY 27 : (----EDITORIAL USE ONLY  MANDATORY CREDIT - "BANDAR ALGALOUD / SAUDI KINGDOM COUNCIL / HANDOUT" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----) King of Saudi Arabia Salman bin Abdulaziz Al Saud (L) delivers a speech after getting the title of honorary PHD from University of Malaya during his visit in Kuala Lumpur, Malaysia on February 27, 2017. (Photo by Bandar Algaloud / Saudi Kingdom Council / Handout/Anadolu Agency/Getty Images)

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JAKARTA, INDONESIA - MARCH 2: ----EDITORIAL USE ONLY MANDATORY CREDIT - "BANDAR ALGALOUD / SAUDI KINGDOM COUNCIL / HANDOUT" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----) Saudi Arabia's King Salman bin Abdul Aziz (L) gestures with Parliament Speaker Setyo Novanto (R) at the parliament in Jakarta on March 2, 2017. Saudi Arabia's King Salman called on March 2 for a united fight against terrorism in a speech to Indonesia's parliament during a landmark state visit to the world's most populous Muslim-majority country. (Photo by Bandar Algaloud / Saudi Kingdom Council / Handout/Anadolu Agency/Getty Images)

JAKARTA, INDONESIA - MARCH 2: ----EDITORIAL USE ONLY  MANDATORY CREDIT - "BANDAR ALGALOUD / SAUDI KINGDOM COUNCIL / HANDOUT" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----) Saudi Arabia's King Salman bin Abdul Aziz (L) gestures with Parliament Speaker Setyo Novanto (R) at the parliament in Jakarta on March 2, 2017. Saudi Arabia's King Salman called on March 2 for a united fight against terrorism in a speech to Indonesia's parliament during a landmark state visit to the world's most populous Muslim-majority country. 


 (Photo by Bandar Algaloud / Saudi Kingdom Council / Handout/Anadolu Agency/Getty Images)