Soldiers of the Honorable Artillery Company fire blank rounds during a 62 gun salute at the Tower of London in front of Tower Bridge on June 2, 2012, to mark the start of diamond jubilee weekend celebrations for Britain's Queen Elizabeth II. Britain was Saturday set to begin four days of festivities for Queen Elizabeth II's diamond jubilee, with organizers hoping a surge in enthusiasm for the royals would inspire crowds to defy drizzling rain.
- [MIGUEL MEDINA/AFP/Getty Images]

Members of the public walk along The Mall which is closed to traffic and bedecked with Union Flags for the Diamond Jubilee weekend on June 2, 2012 in London, England. Earlier the King's Troop Royal Horse Artillery fired a 41-gun Royal Salute in Horse Guards Parade to mark the anniversary of Queen Elizabeth II's Coronation.
- [Oli Scarff/AFP/Getty Images]

Queen Elizabeth II walks out to present the trophies for the winning horse St Nicholas Abbey in the Diamond Jubilee Coronation Cup race on Derby Day on June 2, 2012 in Epsom, England. For only the second time in its history, the UK celebrates the Diamond Jubilee of a monarch. Her Majesty Queen Elizabeth II celebrates the 60th anniversary of her ascension to the throne.
- [WPA Pool/AFP/Getty Images]

Queen Elizabeth II arrives at The Derby on June 2, 2012 in Epsom, England. For only the second time in its history, the UK celebrates the Diamond Jubilee of a monarch. Her Majesty Queen Elizabeth II celebrates the 60th anniversary of her ascension to the throne. Thousands of well-wishers from around the world have flocked to London to witness the spectacle of the weekend's celebrations.
- [Peter Macdiarmid/AFP/Getty Images]

Queen Elizabeth II and Prince Philip, Duke of Edinburgh watch the horses in the parade ring before The Derby on June 2, 2012 in Epsom, England. For only the second time in its history, the UK celebrates the Diamond Jubilee of a monarch. Her Majesty Queen Elizabeth II celebrates the 60th anniversary of her ascension to the throne.
- [Peter Macdiarmid/AFP/Getty Images]

Horse 'Camelot' (L) ridden by jockey Joseph O'Brien heads the field to win the Derby race on Derby Day, the second day of the Epsom Derby horse racing festival, at Epsom in Surrey, southern England, on June 2, 2012 the first official day of Britain's Queen Elizabeth II's Diamond Jubilee celebrations.
- [ADRIAN DENNIS/AFP/Getty Images]

Queen Elizabeth II presents the trophy to Joseph O'Brien (R), the jockey of St Nicholas Abbey, after he won the Diamond Jubilee Coronation Cup on Derby Day on June 2, 2012 in Epsom, England. For only the second time in its history, the UK celebrates the Diamond Jubilee of a monarch. Her Majesty Queen Elizabeth II celebrates the 60th anniversary of her ascension to the throne.
- [WPA Pool/AFP/Getty Images]

Princess Beatrice of York (L) talk with Sophie, Countess of Wessex (C) on the royal balcony on Derby Day, the second day of the Epsom Derby horse racing festival, at Epsom in Surrey, southern England, on June 2, 2012 the first official day of Britain's Queen Elizabeth II's Diamond Jubilee celebrations.
- [CARL COURT/AFP/Getty Images]

Princess Beatrice of York (L), Princess Eugenie of York (C) and Prince Philip, Duke of Edinburgh (R) watch the action from the royal balcony during the Investec Derby, at the start of the weekend marking the Queen's Diamond Jubilee celebrations, at Epsom Racecourse on June 2, 2012 in Epsom, England.
- [Bryn Lennon/AFP/Getty Images]

Queen Elizabeth II smiles as she watches The Derby winner come in with her racing manager John Warren (L) and Prince Edward, Earl of Wessex on June 2, 2012 in Epsom, England. For only the second time in its history, the UK celebrates the Diamond Jubilee of a monarch. Her Majesty Queen Elizabeth II celebrates the 60th anniversary of her ascension to the throne.
- [Peter Macdiarmid/AFP/Getty Images]