Las Vegas Sun - Photograph : Nuclear Security Summit

January 20, 2018

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U.S. President Barack Obama attends the opening session of the Nuclear Summit in The Hague, the Netherlands, on Monday, March 24, 2014.

Yves Herman / AP

U.S. President Barack Obama attends the opening session of the Nuclear Summit in The Hague, the Netherlands, on Monday, March 24, 2014.