(AFP OUT) President Barack Obama (C), flanked by White House Chief of Staff Rahm Emanuel (L) and Secretary of State Hillary Clinton (R), walks from the White House to the Blair House to participate in bilateral meetings April 11, 2010 in Washington, DC. Obama is meeting with leaders who are arriving for the two day nuclear security summit which starts Monday.
( - Source: Pool/Getty Images North America) see more angles »
( - Source: Pool/Getty Images North America) see more angles »
