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DUBAI, UNITED ARAB EMIRATES - NOVEMBER 12: Crown Prince of Abu Dhabi Sheikh Mohammed bin Zayed Al Nahyan (2nd L) attends the Dubai Airshow 2017 at Al Maktoum International Airport in Dubai, United Arab Emirates on November 12, 2017. Fair hosts 1200 companies from 60 countries. (Photo by Mahmoud Khaled/Anadolu Agency/Getty Images)

DUBAI, UNITED ARAB EMIRATES - NOVEMBER 12: Crown Prince of Abu Dhabi Sheikh Mohammed bin Zayed Al Nahyan (2nd L) attends the Dubai Airshow 2017 at Al Maktoum International Airport in Dubai, United Arab Emirates on November 12, 2017. Fair hosts 1200 companies from 60 countries.  (Photo by Mahmoud Khaled/Anadolu Agency/Getty Images)