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HANGZHOU, CHINA - SEPTEMBER 03: U.S. President Barack Obama arrives on Air Force One for the 2016 G20 State Leaders Hangzhou Summit at the Hangzhou Xiaoshan International Airport on September 3, 2016 in Hangzhou, China. (Photo by Etienne Oliveau/Getty Images)

HANGZHOU, CHINA - SEPTEMBER 03:  U.S. President Barack Obama arrives on Air Force One for the 2016 G20 State Leaders Hangzhou Summit at the Hangzhou Xiaoshan International Airport on September 3, 2016 in Hangzhou, China.  (Photo by Etienne Oliveau/Getty Images)