President Barack Obama waves as he walks across the South Lawn of the White House after returning from Camp David on Marine One helicopter, Sunday, Aug., 26, 2012. (AP Photo/Pablo Marti

 

              President Barack Obama waves as he walks across the South Lawn of the White House after returning from Camp David on Marine One helicopter, Sunday, Aug., 26, 2012. (AP Photo/Pablo Marti
President Barack Obama waves as he walks across the South Lawn of the White House after returning from Camp David on Marine One helicopter, Sunday, Aug., 26, 2012. (AP Photo/Pablo Martinez Monsivais)