President Obama walks on the South Lawn at the White House in Washington on Friday, Nov. 30, 2012, before boarding the Marine One helicopter en route to Andrews Air Force Base in suburban Maryland and then on to Hatfield, Pa., to speak at the Rodon Group manufacturing facility. (AP Photo/Charles Dharapak)

Photo by: Charles Dharapak

President Obama walks on the South Lawn at the White House in Washington on Friday, Nov. 30, 2012, before boarding the Marine One helicopter en route to Andrews Air Force Base in suburban Maryland and then on to Hatfield, Pa., to speak at the Rodon Group manufacturing facility. (AP Photo/Charles Dharapak)