Queen Elizabeth II, Ronald Reagan, President of the USA, Queen Elizabeth II riding in the grounds of Windsor Castle with US President Ronald Reagan, during his state visit to the UK, 8th June 1982. She is riding her horse ëBurmeseí and he is mounted on 'Centennial', both gifts to the Queen from the Canadian Mounted Police, 8th June 1982. (Photo by John Shelley Collection/Avalon/Getty Images)
Queen Elizabeth II, Ronald Reagan, President of the USA, Queen Elizabeth II riding in the grounds of Windsor Castle with US President Ronald Reagan, during his state visit to the UK, 8th June 1982. She is riding her horse ëBurmeseí and he is mounted on 'Centennial', both gifts to the Queen from the Canadian Mounted Police, 8th June 1982. (Photo by John Shelley Collection/Avalon/Getty Images)