World Leaders Gather For Nuclear Security Summit 2014

THE HAGUE, NETHERLANDS - MARCH 25: U.S. President Barack Obama (L) chats with U.N. Secretary General Ban Ki-moon as Dutch Prime Minister Mark Rutte (R) chats with Finnish President Sauli Niinisto following the group photo at the 2014 Nuclear Security Summit on March 25, 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. (Photo by Sean Gallup/Getty Images)