Britain's Prince Philip thanks hospital staff as he leaves the Aberdeen Royal Infirmary in Aberdeen, Scotland, on Monday, Aug. 20, 2012, after treatment for a bladder infection. (AP Photo/Andrew Milligan, PA Wire)

Photo by: Andrew Milligan

Britain's Prince Philip thanks hospital staff as he leaves the Aberdeen Royal Infirmary in Aberdeen, Scotland, on Monday, Aug. 20, 2012, after treatment for a bladder infection. (AP Photo/Andrew Milligan, PA Wire)