Russia's Prime Minister Dmitry Medvedev (L) meets with members of the Russian Olympic team as he visits the Olympic Village at the London 2012 Olympic Games in London July 28, 2012.

France's President Francois Hollande congratulates French athlete August 5, 2012.

Britain's Prince William and his wife Catherine, Duchess of Cambridge, are seen at the Olympic Stadium during the London 2012 Olympic Games August 4, 2012.

Britain's Prince Harry (2nd L) holds a kangaroo mascot given by Australian athletes next to MP Tessa Jowell (L), Catherine, Duchess of Cambridge and Mayor of the Olympic Village Sir Charles Allen (R), during a visit to the accommodation for British athlet

Paul McCartney celebrates after Britain's Dani King, Laura Trott and Joanna Rowsell won the track cycling women's team pursuit gold finals at the London 2012 Olympic Games August 4, 2012.

Britain's Zara Phillips, right, receives a silver medal from her mother Princess Anne, left, after Britain won silver in the team equestrian eventing competition at the 2012 Summer Olympics, July 31, 2012, at Greenwich Park in London.

Camilla Parker Bowles, Duchess of Cornwall, Kate Middleton (C), Duchess of Cambridge, and Prince William (R) chat while they wait for Britain's hopeful Zara Phillips compete in the individual equestrian cross country event in the London 2012 Olympic Games

Britain's Prince William talks to British runner Jessica Ennis (L) during a visit to the accommodation for British athletes in the Athletes Village at Olympic Park in Stratford, east London July 31, 2012.

Britain's Prince Harry talks with athletes including British runner Jessica Ennis (3rd R), during a visit to the accommodation for British athletes in the Athletes Village at Olympic Park in Stratford, east London July 31, 2012.

Britain's Princesses Eugenie (L) and Beatrice watch the swimming events during the London 2012 Olympic Games at the Aquatics Centre July 30, 2012.

(L-R) Britain's Peter Phillips, Prince William, Kate Middleton, Duchess of Cambridge, and Prince Harry attend the Eventing Jumping equestrian event at the London 2012 Olympic Games in Greenwich Park, July 31, 2012.

U.S. first lady Michelle Obama claps her hands during the medal presentation ceremony for Ryan Lochte of the U.S., who won the men's 400m individual medley, at the London 2012 Olympic Games at the Aquatics Centre July 28, 2012.

Britain's Queen Elizabeth (R) speaks to Prime Minister David Cameron as she arrives for the opening ceremony of the London 2012 Olympic Games at the Olympic Stadium July 27, 2012.

U.S. first lady Michelle Obama stands next to British footballer David Beckham during an event at the U.S. embassy in central London July 27, 2012.

Britain's Queen Elizabeth visits the Aquatics Centre with London 2012 Olympics Games chief Sebastian Coe (L) July 28, 2012

Britian's Prince Charles and Camilla, Duchess of Cornwall, stand in front of the Spanish team before the men's road cycling race at the London 2012 Olympic Games at The Mall July 28, 2012.

Britain's Zara Phillips and her horse High Kingdom take part in the Equestrian Eventing horse inspection at the London 2012 Olympic Games in Greenwich Park, July 27, 2012.

Britain's Prince William and his wife Catherine, Duchess of Cambridge arrive for the opening ceremony of the London 2012 Olympic Games at the Olympic Stadium July 27, 2012.

Britain's Prime Minister, David Cameron, (L) stands with his wife Samantha (C) and Princess Anne after arriving for the opening ceremony of the London 2012 Olympic Games at the Olympic Stadium July 27, 2012.

U.S. Republican presidential candidate Mitt Romney and his wife Ann wave during the opening ceremony of the London 2012 Olympic Games at the Olympic Stadium July 27, 2012.

Catherine, the Duchess of Cambridge, poses for a picture with the President of Mongolia Elbegdorj Tsakhia (L) and Erdene Elbegdorj during a reception at Buckingham Palace, London July 27, 2012, to welcome Heads of State and Heads of Government to the Unit

Acting Indian Olympic Association President Vijay Kumar Malhotra (C), his wife Krisha Malhotra (R) and guest Gurmit Singh (L) of India try on their glasses as they sit in the VIP box before the opening ceremony of the London 2012 Olympic Games

Britain's Prince William (C), his wife Catherine (L), Duchess of Cambridge and Prince Harry cheer for the British team as they watch the track cycling event at the Velodrome during the London 2012 Olympic Games August 2, 2012.

Britain's Prime Minister David Cameron (C) applauds the gold medal won by rowers of Britain at Eton Dorney, as he watches the race on television with workers at Team GB house in Stratford, east London on August 3, 2012, during The 2012 London Olympic Game

US First Lady Michelle Obama sits next to an unidentified woman as she attends the women's singles tennis match between Serbia's Jelena Jankovic and Serena Williams of the US during the London 2012 Olympic Games at the All England Tennis Club in Wimbledon

Britain's Prince William, the Duke of Cambridge, (L) and Catherine, Duchess of Cambridge wait prior to the start of the swimming event at the London 2012 Olympic Games on August 3, 2012 in London.

US swimmer Michael Phelps throws flowers to his mother Debbie after he won gold in the men's 4x100m medley relay final during the swimming event at the London 2012 Olympic Games on August 4, 2012 in London.