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Boxes move along a conveyor belt at an Amazon fulfillment center on January 20, 2015 in Tracy, California. (Justin Sullivan/Getty Images)

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Democratic presidential candidate Sen. Bernie Sanders (D-VT) during a campaign rally on March 15, 2016 in Phoenix, Arizona. (Ralph Freso/Getty Images)

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Russian President Vladimir Putin (R) shakes hands with Chinese President Xi Jinping (L) during their joint press conference in the Grand Kremlin Palace on May 8, 2015 in Moscow, Russia. (Sasha Mordovets/Getty Images)

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The graffiti tagged on the wall of a house in the Iraqi city of Mosul, July 26, 2014. It reads in Arabic : 'Real estate property of the Islamic State (IS)'. (AFP/Getty Images)

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Donald Trump and his family attend a welcome arrival event with Governor Mike Pence and his family at the Great Lakes Science Centre on July 20, 2016 in Cleveland, Ohio. (Jeff J Mitchell/Getty Images)

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Police officers and rescue workers stand near a van that ploughed into a crowd leaving a fireworks display in the French Riviera town of Nice on July 14, 2016. (VALERY HACHE/AFP/Getty Images)

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Republican presidential candidate Donald Trump greets reporters at the Fox Theatre on March 3, 2016 in Detroit, Michigan. (Chip Somodevilla/Getty Images)

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Democratic presidential candidate Hillary Clinton(L)on June 15, 2016 and presumptive Republican presidential nominee Donald Trump on June 13, 2016. (DSK/AFP/Getty Images)

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The European Union flag outside EU Commission Headquarters on March 22, 2016 in Brussels, Belgium. ( Carl Court/Getty Images)