Britain's Prince Philip smiles and waves as he leaves Papworth Hospital in Cambridge, England, on Tuesday, Dec. 27, 2011, after treatment for a blocked coronary artery. (AP Photo/Press Association, Chris Radburn)

Photo by: Chris Radburn

Britain's Prince Philip smiles and waves as he leaves Papworth Hospital in Cambridge, England, on Tuesday, Dec. 27, 2011, after treatment for a blocked coronary artery. (AP Photo/Press Association, Chris Radburn)