THE HAGUE, NETHERLANDS - MARCH 24:  Chinese President Xi Jinping (C) attends the opening plenary session of the 2014 Nuclear Security Summit on March 24, 2014 in The Hague, Netherlands. Leaders from around the world have come to discuss matters related to international nuclear security, though the summit is overshadowed by recent events in Ukraine. The leaders of the G7 nations will hold a short G7 summit tonight.  (Photo by Sean Gallup/Getty Images)