World Leaders Gather For Nuclear Security Summit 2014

THE HAGUE, NETHERLANDS - MARCH 25: U.S. President Barack Obama (R) and Dutch Prime Minister Mark Rutte chairman of the Nuclear Security Summit 2014 speak during a press conference March 25, 2014 in The Hague, the 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. (Photo by Toussaint Kluiters-Pool/Getty Images)