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SHEFFIELD, ENGLAND - NOVEMBER 18: Queen Elizabeth II and Prince Philip, Duke of Edinburgh wear 3 D glasses to watch a display and pilot a JCB digger, during a visit to the University of Sheffield Advanced Manufacturing Research centre, on November 18, 2010 in Sheffield, England. (Photo by John Giles - WPA Pool/Getty Images)

SHEFFIELD, ENGLAND - NOVEMBER 18: Queen Elizabeth II  and Prince Philip, Duke of Edinburgh wear 3 D glasses to watch a display and pilot a JCB digger, during a visit to the University of Sheffield Advanced Manufacturing Research centre, on November 18, 2010 in Sheffield, England. (Photo by John Giles - WPA Pool/Getty Images)