Queen spends day at races as jubilee events begin
Photo Gallery Britain Queens Jubilee
FILE - In this June 8, 1982 file photo, U.S. President Ronald Reagan, on Centennial, and Britain's Queen Elizabeth II, on Burmese, go horseback riding on the grounds of Windsor Castle, England. Starting Saturday, June 2, 2012, Queen Elizabeth II begins a four-day celebration of her 60 years on the throne. (AP Photo/Bob Daugherty, File)