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ABU DHABI, UNITED ARAB EMIRATES - FEBRUARY 05: A general view of the city skyline at sunset from Dhow Harbour on February 5, 2015 in Abu Dhabi, United Arab Emirates. Abu Dhabi is the capital of the United Arab Emirates and the second most populous city after Dubai with a population of around two million people. (Photo by Dan Kitwood/Getty Images)

ABU DHABI, UNITED ARAB EMIRATES - FEBRUARY 05:  A general view of the city skyline at sunset from Dhow Harbour on February 5, 2015 in Abu Dhabi, United Arab Emirates. Abu Dhabi is the capital of the United Arab Emirates and the second most populous city after Dubai with a population of around two million people.  (Photo by Dan Kitwood/Getty Images)