US President Obama walks over to greet visitors before departing the White House on Marine One on the South Lawn in Washington

 
US President Obama walks over to greet visitors before departing the White House on Marine One on the South Lawn in Washington
U.S. President Barack Obama (L, back to camera) walks over to greet visitors before departing the White House on Marine One on the South Lawn in Washington August 2, 2010. REUTERS/Jim Young (UNITED STATES - Tags: POLITICS)