U.S. President Barack Obama waves as he walks on the South Lawn of the White House upon his return to Washington

 
U.S. President Barack Obama waves as he walks on the South Lawn of the White House upon his return to Washington
U.S. President Barack Obama waves as he walks on the South Lawn of the White House upon his return to Washington May 2, 2012 after a trip to Afghanistan. REUTERS/Yuri Gripas