LONDON, ENGLAND - MARCH 17: Prince Philip, Duke of Edinburgh opens The 'Land Of The Lions' Exhibit at London Zoo on March 17, 2016 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images)
LONDON, ENGLAND - MARCH 17: Prince Philip, Duke of Edinburgh opens The 'Land Of The Lions' Exhibit at London Zoo on March 17, 2016 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images)