Olympic rings encircle London

A Juggler poses with Olympic rings outside the Stratford Tube Station on July 26, 2012 in London, England. (Photo by Pascal Le Segretain/Getty Images)

The full moon rises through the Olympic Rings hanging beneath Tower Bridge during the London 2012 Olympic Games August 3, 2012. REUTERS/Luke MacGregor (BRITAIN - Tags: SPORT OLYMPICS ENVIRONMENT CITYSPACE)

A road is marked out with an Olympic Games Lane on July 17, 2012 in London, England. Competitors and officials have started to arrive ahead of the London 2012 Olympic Games. (Photo by Peter Macdiarmid/Getty Images)

Yibing Chen of China competes in the rings in the Artistic Gymnastics Men's Team final on Day 3 of the London 2012 Olympic Games at North Greenwich Arena on July 30, 2012 in London, England. (Photo by Ronald Martinez/Getty Images)

In this handout image released by LOCOG on July 9, 2012, an aerial view of Olympic Rings cut into the grass of Richmond Park, London, England. The rings, which are approximately 300 metres wide and over 135 metres tall, are visible on the Heathrow flight path, ready to welcome athletes and visitors to the London 2012 Olympic Games. The five rings represent the five continents and the meeting of athletes from throughout the world at the Olympic Games. (Photo by David Poultney for LOCOG via Getty Images)

In this handout image provided by LOCOG, Torchbearer Kasey Hagan wears a design of the Olympic Rings in his hairstyle as he carries the Olympic Flame on the Torch Relay leg between Felixstowe and Ipswich on Day 48 of the London 2012 Olympic Torch Relay on July 5, 2012 in Felixstowe, England. The Olympic Flame is now on day 48 of a 70-day relay involving 8,000 torchbearers covering 8,000 miles. (Photo by LOCOG via Getty Images)

Bulgaria's swimmer Ekaterina Avramova wears a Olympic rings necklace at Olympic Village on July 22, 2012 in London, England. (Photo by Feng Li/Getty Images)

LONDON, ENGLAND - JULY 22: A view of the olympic rings at St. Pancras International Station before the start of the Summer Olympic Games on July 22, 2012 in London, England. (Photo by Elsa/Getty Images)

LONDON, ENGLAND - JULY 27: The Olympic rings are projected onto the House of Parliament during a light show to mark the start of the 2012 Olympic Games on July 27, 2012 in London, England. (Photo by Harry How/Getty Images)

Lebron James #6 of United States stands on the court in the first half against Nigeria during the Men's Basketball Preliminary Round match on Day 6 of the London 2012 Olympic Games at Basketball Arena on August 2, 2012 in London, England. (Photo by Christian Petersen/Getty Images)

LONDON, ENGLAND - JULY 29: A detail view of a tennis net displaying the Olympic rings on Day 2 of the London 2012 Olympic Games at the All England Lawn Tennis and Croquet Club in Wimbledon on July 29, 2012 in London, England. (Photo by Clive Brunskill/Getty Images)

LONDON, ENGLAND - JULY 26: A detail of the Olympic Rings reflects in the pool water during a training session ahead of the London Olympic Games at the Aquatics Centre in Olympic Park on July 26, 2012 in London, England. (Photo by Clive Rose/Getty Images)

A general view of the London 2012 sign and Olympic rings on the side of a boat on Day 6 of the London 2012 Olympic Games at Eton Dorney on August 2, 2012 in Windsor, England. (Photo by Jamie Squire/Getty Images)

In this handout image provided by LOCOG, Torchbearer 018 Amber Charles stands underneath the giant Olympic Rings on the River Thames outside City Hall during Day 70 of the London 2012 Olympic Torch Relay on July 27, 2012 in London, England. The Olympic Flame is now on Day 70 of a 70-day relay involving 8,000 torchbearers covering 8,000 miles. (Photo by LOCOG via Getty Images)

Victoria Pendleton of Great Britain celebrates winning gold in the Women's Keirin Track Cycling final on Day 7 of the London 2012 Olympic Games at Velodrome on August 3, 2012 in London, England. (Photo by Bryn Lennon/Getty Images)

A volunteer polishes the rings on the medal stand at the judo on Day two of the London 2012 Olympic Games at ExCeL on July 29, 2012 in London, Englan (Photo by Michael Steele/Getty Images)

The Olympic Rings are reflected in a puddle in the Olympic Park on Day 2 of the London 2012 Olympic Games on July 29, 2012 in London, England. (Photo by Jeff J Mitchell/Getty Images)

Detail photo of a 2012 Olympic tattoo on Kelsi Fairbrother of Great Britain during the Women's Handball Preliminaries Group A match between Great Britain and Brazil on Day 5 of the London 2012 Olympic Games at The Copper Box on August 1, 2012 in London, England. (Photo by Jeff Gross/Getty Images)

Pictured: (l-r) Natalie Morales, Savannah Guthrie, Matt Lauer, Al Roker on August 2, 2012 -- Photo by: (Dave Hogan/NBC/NBCU Photo Bank via Getty Images)

The full moon rises through the Olympic Rings hanging beneath Tower Bridge during the London 2012 Olympic Games August 3, 2012. REUTERS/Luke MacGregor (BRITAIN - Tags: SPORT OLYMPICS CITYSPACE TPX IMAGES OF THE DAY ENVIRONMENT)

A detail view of an athlete's hand on the pommel horse with the Olympic rings in the Artistic Gymnastics Men's Individual All-Around final on Day 5 of the London 2012 Olympic Games at North Greenwich Arena on August 1, 2012 in London, England. (Photo by Ezra Shaw/Getty Images)

A barge displaying a giant set of Olympic rings is positioned in the centre of the River Thames on July 30, 2012 in London, England. London's transport infrastructure is expected to face a major burden today on the first working day of the London 2012 Olympic Games. (Photo by Oli Scarff/Getty Images)

An Olympic 'torch bearer' holds a London 2012 Olympic torch in Kew Gardens on April 18, 2012 in London, England. Kew Gardens unveiled today a Giant Olympic rings installation made up of at least 20,000 plants and flowers to celebrate one hundred days till the opening ceremony of The London 2012 Olympic Games on July 27 and to announce the official motto as "Inspire a generation." (Photo by Oli Scarff/Getty Images)

In this handout image provided by LOCOG, Torchbearer 048 Oliver Golding holds the Olympic Flame in between the Olympic Rings at Kew Gardens on July 24, 2012 in London, England. The Olympic Flame is now on Day 67 of a 70-day relay involving 8,000 torchbearers covering 8,000 miles. (Photo by LOCOG via Getty Images)

The giant London 2012 Olympic Rings are pictured at Terminal 5 of Heathrow Airport on June 20, 2012 in London, England. (Photo by Dean Mouhtaropoulos/Getty Images)

The Basketball Arena displays the Olympic Rings at the Olympic Park on July 14, 2012 in London, England. (Photo by Stanley Chou/Getty Images)

The Olympic rings hang in front of Nelson's Column in Trafalgar Square on July 23, 2012 in London, England. (Photo by Mike Hewitt/Getty Images)

The Olympic Rings are seen at St.Pancras International Station on July 24, 2012 in London, England. (Photo by Ryan Pierse/Getty Images)

The Olympic rings are seen at the top of Box Hill on July 24, 2012 in Surrey, England. (Photo by Bryn Lennon/Getty Images). Box Hill features prominently in the route of the Olympic cycling road races. The men will climb it nine times and the women twice. (Photo by Bryn Lennon/Getty Images)

A general view of the Olympic rings are seen ahead of the London Olympic Games at Olympic Park on July 23, 2012 in London, England. (Photo by Mark Kolbe/Getty Images)

Torch bearer Amber Charles stands under giant Olympic rings next to Tower Bridge on the final day of the London 2012 Olympic Torch Relay on July 27, 2012 in London, England. The Olympic flame is making its way through the capital on the final day of its journey around the UK before arriving in the Olympic Stadium tonight for the Olympic games' Opening Ceremony. (Photo by Peter Macdiarmid/Getty Images)

The Olympic rings as seen from the water during training at the Weymouth & Portland Venue ahead of the London 2012 Olympic Games on July 27, 2012 in Weymouth, England. (Photo by Clive Mason/Getty Images)

The Olympic rings as seen from the water during training at the Weymouth & Portland Venue ahead of the London 2012 Olympic Games on July 27, 2012 in Weymouth, England. (Photo by Clive Mason/Getty Images)

Detail of the Olympic Rings on Day 1 of the London 2012 Olympic Games at Eton Dorney on July 28, 2012 in Windsor, England. (Photo by Harry How/Getty Images)

The Olympic rings light up the stadium during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012 in London, England. (Photo by Ian MacNicol/Getty Images)

The Olympic Rings display at a park in the Centre of Glasgow city in a procession ceremony conjunction with the 2012 London Olympic Games opening ceremony at London Olympic Stadium on July 27, 2012 in Glasgow, Scotland. (Photo by Getty Images/Getty Images)

A detail view of a table tennis net displaying the Olympic rings on Day 1 of the London 2012 Olympic Games at ExCeL on July 28, 2012 in London, England. (Photo by Feng Li/Getty Images)

Members of the public have their pictures taken in front of the Olympic Rings in the Olympic Park on day one of the London 2012 Olympic Games on July 28, 2012 in London, England. (Photo by Jeff J Mitchell/Getty Images)

The Olympic rings are seen outside the venue prior to the days competition on Day 2 of the London 2012 Olympic Games at the Aquatics Centre on July 29, 2012 in London, England. (Photo by Clive Rose/Getty Images)

The Olympic rings are seen on the River Thames on Day 2 of the London 2012 Olympic Games on July 29, 2012 in London, England. (Photo by Felix Kunze/WireImage)

A detail view of the Olympic rings on a tennis net during Day 3 of the London 2012 Olympic Games at the All England Lawn Tennis and Croquet Club in Wimbledon on July 30, 2012 in London, England. (Photo by Jamie Squire/Getty Images)

Condensation is seen on an Olympic rings logo outside the Olympic Stadium on March 19, 2012 in London, England. (Photo by Julian Finney/Getty Images)

A barge displaying a giant set of Olympic rings is positioned in the centre of the River Thames on July 30, 2012 in London, England. London's transport infrastructure is expected to face a major burden today on the first working day of the London 2012 Olympic Games. (Photo by Oli Scarff/Getty Images)

Olympic rings with cycle powered fountains are installed on The River Thames at Greenwich on August 1, 2012 in Greenwich, England. Visitors to The Old Royal Naval College can use harnessed bicycles to power fountains during the day and help illuminate the giant Olympic rings at night. (Photo by Peter Macdiarmid/Getty Images)

A detail view of an athlete chalking the rings in the Artistic Gymnastics Men's Individual All-Around final on Day 5 of the London 2012 Olympic Games at North Greenwich Arena on August 1, 2012 in London, England. (Photo by Ronald Martinez/Getty Images)

The Olympic rings are shown in the St. Pancras International rail station during the London 2012 Olympic Games on July 30, 2012 in London, England. (Photo by Rob Carr/Getty Images)

The Olympic rings are seen at Tower Bridge as part of the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012 in London, England. (Photo by Mark Kolbe/Getty Images)

LONDON, ENGLAND - JULY 22: A general view of the Olympic rings during previews ahead of the London Olympic Games at Olympic Park on July 22, 2012 in London, England. (Photo by Clive Rose/Getty Images)

LONDON, ENGLAND - JULY 28: A detail view of a table tennis net displaying the Olympic rings on Day 1 of the London 2012 Olympic Games at ExCeL on July 28, 2012 in London, England. (Photo by Feng Li/Getty Images)

LONDON, ENGLAND - JULY 28: Members of the public have their pictures taken in front of the Olympic Rings in the Olympic Park on day one of the London 2012 Olympic Games on July 28, 2012 in London, England. (Photo by Jeff J Mitchell/Getty Images)

The full moon rises through the Olympic Rings hanging beneath Tower Bridge during the London 2012 Olympic Games August 3, 2012. REUTERS/Luke MacGregor (BRITAIN - Tags: SPORT OLYMPICS ENVIRONMENT CITYSPACE)