Brendan Smialowski/AFP Photo
US First Lady Michelle Obama touches the nose of US President Barack Obama before he welcomes Singapore Prime Minister Lee Hsien Loong at the White House in Washington, DC
Christophe Archambault/AFP Photo
US President Barack Obama waves as he disembarks from Air Force One at the Tan Son Nhat airport in Ho Chi Minh City today.
Photographers in the press pen as Prime Minster David Cameron welcomes US President Barack Obama to Downing Street
Pablo Martinez Monsivais/AP
President Barack Obama returns a salute as he boards Air Force One before his departure from Andrews Air Force Base
U.S. President Barack Obama (C) reviews a marsh band during a welcome ceremony at the National Palace in Addis Ababa, Ethiopia today.
Russia’s President Vladimir Putin gets a laugh as he takes his place at a group photo of G20 leaders outside the Konstantin Palace in St Petersburg, Russia.
US President Barack Obama shakes hands with Tanzanians during an official arrival ceremony hosted by Tanzania President Jakaya Kikwete and First lady Salma Kikwete in Dar Es Salaam.
A jetliner flies over flags flying at half-staff at the Washington Monument in Washington, Tuesday, April 16, 2013, after President Obama ordered flags to be lowered on federal building to honor the loss of life from the explosions at the Boston Marathon.