President Barack Obama arrives to speak during a closing session at the Nuclear Security Summit April 1, 2016 in Washington, D.C. After a spate of...
President Barack Obama speaks during a closing session at the Nuclear Security Summit April 1, 2016 in Washington, D.C. After a spate of terrorist...
President Barack Obama waves among other heads of state and attendees during a family photo at the Nuclear Security Summit on April 1, 2016 in...
President Barack Obama arrives to speak during a closing session at the Nuclear Security Summit April 1, 2016 in Washington, D.C. After a spate of...
President Barack Obama arrives to speak during a closing session at the Nuclear Security Summit April 1, 2016 in Washington, D.C. After a spate of...
President Barack Obama, right, shakes hands with Mauricio Macri, Argentina's president, during an opening plenary entitled 'National Actions to...
Vice President Joe Biden and Secretary of State John Kerry take part in a bilateral meeting between US President Barack Obama and China's President...
President Barack Obama and Secretary of State Hillary Clinton walk from the White House to the Blair House to participate in bilateral meetings April...
Ukraine's president Petro Poroshenko gestures behind U.S. President Barack Obama during a family photo at the Nuclear Security Summit on April 1,...
President Barack Obama speaks as Xi Jinping, China's president , and Francois Hollande, France's president , listen during a P5+1 multilateral...
President Barack Obama and Secretary of State Hillary Clinton walk from the White House to the Blair House to participate in bilateral meetings April...
King Abdullah II ibn Al Hussein of Jordan, U.S. President Barack Obama, Dutch prime minister Mark Rutte and China's president Xi Jinping stand during...
President Barack Obama takes part in a bilateral meeting with Kazakhstan President Nursultan Nazarbayev at Blair House on the sidelines of the...
President Barack Obama takes part in a bilateral meeting with Indian Prime Minister Manmohan Singh at Blair House on the sidelines of the Nuclear...
World leaders and heads of delegations participate in a group photo at the Nuclear Security Summit at the Washington Convention Center April 13, 2010...
World leaders and heads of delegations participate in a group photo at the Nuclear Security Summit at the Washington Convention Center April 13, 2010...
King Abdullah II of Jordan shakes hands with President of South Africa Jacob Zuma as they participate during the group photo session of the Nuclear...
Trairong Suwankiri, Deputy Prime Minister of Thailand , David Miliband, Secretary of State for Foreign and Commonwealth Affairs of the United Kingdom...
Deputy Prime Minister and Minister of Intelligence and Atomic Energy of Israel Dan Meridor, Secretary-General of the United Nations Ban Ki-moon,...
Polish Ambassador to the United States Robert Kupiecki, President Silvio Berlusconi of Italy, and Prime Minister of Malaysia Najib Razak participate...
World leaders and heads of delegations participate in a group photo at the Nuclear Security Summit on April 13, 2010 in Washington, DC. Forty-seven...
President Jacob Zuma of South Africa leaves the room after participating in a group photo with world leaders and heads of delegations at the Nuclear...
President Barack Obama participates in a group photo with President of Kazakhstan Nursultan Nazarbayev , King Abdullah II of Jordan, and , President...
President Barack Obama participates in a group photo with President of Kazakhstan Nursultan Nazarbayev , King Abdullah II of Jordan, and , President...
President Barack Obama takes part in a courtsey call with with Nigeria�s acting president Goodluck Jonathan at Blair House on the sidelines of the...
President Barack Obama and Secretary of State Hillary Clinton walk from the White House to the Blair House to participate in bilateral meetings April...
President Barack Obama and Secretary of State Hillary Clinton walk from the White House to the Blair House to participate in bilateral meetings April...
President Barack Obama , flanked by White House Chief of Staff Rahm Emanuel and Secretary of State Hillary Clinton , walks from the White House to...
President Barack Obama , flanked by White House Chief of Staff Rahm Emanuel and Secretary of State Hillary Clinton , walks from the White House to...
President Barack Obama , flanked by White House Chief of Staff Rahm Emanuel and Secretary of State Hillary Clinton , walks from the White House to...
President Barack Obama , flanked by White House Chief of Staff Rahm Emanuel and Secretary of State Hillary Clinton , walks from the White House to...
President Barack Obama , flanked by White House Chief of Staff Rahm Emanuel and Secretary of State Hillary Clinton , walks from the White House to...
President Barack Obama , flanked by White House Chief of Staff Rahm Emanuel and Secretary of State Hillary Clinton , walks from the White House to...
President Barack Obama and Kazakhstan President Nursultan Nazarbayev take part in a bilateral meeting at Blair House on the sidelines of the Nuclear...
President Barack Obama takes part in a bilateral meeting with Kazakhstan President Nursultan Nazarbayev at Blair House on the sidelines of the...
President Barack Obama takes part in a bilateral meeting with Indian Prime Minister Manmohan Singh at Blair House on the sidelines of the Nuclear...
President Barack Obama takes part in a bilateral meeting with Indian Prime Minister Manmohan Singh at Blair House on the sidelines of the Nuclear...
President Barack Obama arrives to speak during a closing session at the Nuclear Security Summit April 1, 2016 in Washington, D.C. After a spate of...
President Barack Obama arrives to speak during a closing session at the Nuclear Security Summit April 1, 2016 in Washington, D.C. After a spate of...
President Barack Obama arrives to speak during a closing session at the Nuclear Security Summit April 1, 2016 in Washington, D.C. After a spate of...
President Barack Obama departs after speaking during a closing session at the Nuclear Security Summit April 1, 2016 in Washington, D.C. After a spate...
President Barack Obama arrives to speak during a closing session at the Nuclear Security Summit April 1, 2016 in Washington, D.C. After a spate of...
President Barack Obama points to a member of the media to take a question during a news conference at the Nuclear Security Summit in Washington,...
President Barack Obama walks off-stage after speaking during a news conference at the Nuclear Security Summit in Washington, D.C., U.S., on Friday,...
President Barack Obama points to a member of the media to take a question during a news conference at the Nuclear Security Summit in Washington,...
President Barack Obama speaks during a news conference at the Nuclear Security Summit in Washington, D.C., U.S., on Friday, April 1, 2016. After a...
President Barack Obama listens to a question during a news conference at the Nuclear Security Summit in Washington, D.C., U.S., on Friday, April 1,...
President Barack Obama listens to a question during a news conference at the Nuclear Security Summit in Washington, D.C., U.S., on Friday, April 1,...
President Barack Obama speaks during a news conference at the Nuclear Security Summit in Washington, D.C., U.S., on Friday, April 1, 2016. After a...
President Barack Obama speaks during a news conference at the Nuclear Security Summit in Washington, D.C., U.S., on Friday, April 1, 2016. After a...
President Barack Obama arrives to speak during a news conference at the Nuclear Security Summit in Washington, D.C., U.S., on Friday, April 1, 2016....
President Barack Obama speaks during a news conference at the Nuclear Security Summit in Washington, D.C., U.S., on Friday, April 1, 2016. After a...
President Barack Obama speaks during a news conference at the Nuclear Security Summit in Washington, D.C., U.S., on Friday, April 1, 2016. After a...
President Barack Obama pauses while speaking during a news conference at the Nuclear Security Summit in Washington, D.C., U.S., on Friday, April 1,...
President Barack Obama speaks during a news conference at the Nuclear Security Summit in Washington, D.C., U.S., on Friday, April 1, 2016. After a...
President Barack Obama speaks during a news conference at the Nuclear Security Summit in Washington, D.C., U.S., on Friday, April 1, 2016. After a...
President Barack Obama speaks during a news conference at the Nuclear Security Summit in Washington, D.C., U.S., on Friday, April 1, 2016. After a...
Representatives of delegation participate a scenario-based policy discussion of the 2016 Nuclear Security Summit April 1, 2016 in Washington, DC....
President Barack Obama arrives to speak during a closing session at the Nuclear Security Summit April 1, 2016 in Washington, D.C. After a spate of...
President Barack Obama arrives to speak during a closing session at the Nuclear Security Summit April 1, 2016 in Washington, D.C. After a spate of...