President Obama holds up a bottle of beer Sept. 4, 2012, as he delivers a case of White House brewed beer to the firefighters at Fire Station No. 14 in Norfolk, Va., during an unscheduled campaign stop. (Associated Press)
White House press secretary Jay Carney during his daily news briefing at the White House in Washington, Monday, Aug. 20, 2012. (AP Photo/Pablo Martinez Monsivais)
President Barack Obama walks across the South Lawn of the White House in Washington after his arrival from Camp David on Marine One helicopter, Sunday, Aug., 26, 2012. (AP Photo/Pablo Martinez Monsivais)
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)
Former astronauts (from left) Buzz Aldrin, Michael Collins and Neil Armstrong are pictured in the Oval Office at the White House in Washington on July 20, 2009, the 40th anniversary of the Apollo 11 moon landing. (AP Photo/Alex Brandon)