LONDON, ENGLAND - MARCH 17: Queen Elizabeth II accompanied by Prince Philip, Duke of Edinburgh officially opens the Land of the Lions enclosure at London Zoo on March 17, 2016 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - MARCH 17: Queen Elizabeth II accompanied by Prince Philip, Duke of Edinburgh officially opens the Land of the Lions enclosure at London Zoo on March 17, 2016 in London, England. (Photo by Karwai Tang/WireImage)