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LONDON, UNITED KINGDOM - MARCH 11: Queen Elizabeth II Smiling And Happy In Her Role As Head Of The Commonwealth Attending The Commonwealth Day Observance Service At Westminster Abbey (Photo by Tim Graham/Getty Images)

LONDON, UNITED KINGDOM - MARCH 11:  Queen Elizabeth II  Smiling And Happy In Her Role As Head Of The Commonwealth Attending The Commonwealth Day Observance Service At Westminster Abbey  (Photo by Tim Graham/Getty Images)