Athletes react as confetti rains down on them during the Closing Ceremony at the 2012 Summer Olympics, Aug. 13, 2012, in London.

Spice Girls perform during the closing ceremony of the 2012 London Olympic Games at the Olympic stadium in London, Aug. 12, 2012.

Portugal's Nuno Delgado, right, dances with performers during the Closing Ceremony at the 2012 Summer Olympics, Aug. 13, 2012, in London.

A performer is suspended over the Olympic Stadium during the Closing Ceremony at the 2012 Summer Olympics, Monday, Aug. 13, 2012, in London.

Roger Daltrey, left, and Pete Townshend of The Who perform during the Closing Ceremony at Olympic Stadium, Aug. 12, 2012 in London, England.

In this photo taken with a fisheye lens, performers pose and take photographs of each other during the Closing Ceremony at the 2012 Summer Olympics, Aug. 13, 2012, in London.

Fireworks explode during the Closing Ceremony at the 2012 Summer Olympics, Aug. 13, 2012, in London.

Tamara Vega, of Mexico, falls off her horse Douce de Roulad, during the equestrian show jumping stage of the women's modern pentathlon at the 2012 Summer Olympics, Sunday, Aug. 12, 2012, in London.

Sushil Kumar of India in action against Akzhurek Tanatarov of Kazakhstan during the Men's Freestyle Wrestling 66kg semi final match on Day 16 of the London 2012 Olympic Games at ExCeL on August 12, 2012 in London, England.

Sweden's Andreas Nilsson, background challenges France's Luc Abalo, foreground, during their men's handball gold medal match at the 2012 Summer Olympics, Sunday, Aug. 12, 2012, in London.

Jacob Stephen Varner of the United States in action against George Gogshelidze of Georgia during the Men's Freestyle Wrestling 96kg semi final match on Day 16 of the London 2012 Olympic Games at ExCeL on August 12, 2012 in London, England.

Stephen Kiprotich of Uganda celebrates crossing the finish line to win gold in the Men's Marathon on Day 16 of the London 2012 Olympic Games at The Mall on August 12, 2012 in London, England.

Kevin Durant #5 of the United States and team mate LeBron James #6 of the United States celebrate in the Men's Basketball gold medal game between the United States and Spain on Day 16 of the London 2012 Olympics Games at North Greenwich Arena on August 12, 2012 in London, England.

Adam Marosi of Hungary celebrates winning a fencing bout during the men's modern pentathlon at the 2012 Summer Olympics in London, Saturday, Aug. 11, 2012.

The United States' Deedee Trotter, right, United States' Sanya Richards-Ross, front center and United States' Allyson Felix, back left, celebrate winning gold in the women's 4x400-meter relay final in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 11, 2012.

Hwang Woojin, of South Korea and his horse Shearwater Oscar fall down after the horse bucked following the starting bell sounded to start their run in the equestrian show jumping stage of the men's modern pentathlon at the 2012 Summer Olympics, Saturday, Aug. 11, 2012, in London.

Thailand's Kaeo Pongprayoon, in blue, lies on the mat after losing to China's Zou Shiming in the men's light flyweight 49kg boxing gold medal match at the 2012 Summer Olympics, Saturday, Aug. 11, 2012, in London.

Russia's Daria Dmitrieva bites her silver medal, as Gold medallist Russia's Evgeniya Kanaeva smiles during the podium ceremony for the rhythmic gymnastics individual all-around final at the 2012 Summer Olympics, Saturday, Aug. 11, 2012, in London.

Russia's Anna Chicherova celebrates after she cleared the bar to win gold in the women's high jump final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 11, 2012.

Qiu Bo from China competes during the men's 10-meter platform diving semi final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Saturday, Aug. 11, 2012.

Daria Dmitrieva of Russia competes during the Individual All-Around Rhythmic Gymnastics final on Day 15 of the London 2012 Olympics Games at Wembley Arena on August 11, 2012 in London, England.

Riley McCormick of Canada competes in the Men's 10m Platform Diving Semifinal on Day 15 of the London 2012 Olympic Games at the Aquatics Centre on August 11, 2012 in London, England.

Anne-Caroline Graffe of France (blue) competes against Natalya Mamatova of Uzbekistan (red) during the Women's +67kg Taekwondo Preliminary Roundon on Day 15 of the London 2012 Olympic Games at ExCeL on August 11, 2012 in London, England.

Britain's national hockey team's defender Iain Lewers (FRONT) celebrates after scoring with teammate midfielder Harry Martin during the men's field hockey bronze medal match between Australia and Britain at The Riverbank Arena in London on August 11, 2012, for The London 2012 Olympic Games.

Jaime Yusept Espinal of Puerto Rico competes against Soslan Gattsiev of Belarus (in blue) during the men's 84-kg freestyle wrestling competition at the 2012 Summer Olympics, Saturday, Aug. 11, 2012, in London.

Great Britain competes in the women's teams synchronized swimming free routine final on Day 14 of the London 2012 Olympic Games at the Aquatics Centre in London, England, Aug. 10, 2012.

Kerron Stewart, left, of Jamaica and Elyzaveta Bryzgina of Ukraine race to the finish line during the women's 4x100m relay at the London 2012 Olympic Games at Olympic Stadium in London, England, Aug. 9, 2012.

Britain's Anthony Ogogo, in red, is knocked down by Brazil's Esquiva Falcao Florentino in a men's middleweight 75kg boxing semifinal at the 2012 Summer Olympics, Aug. 10, 2012, in London.

Usain Bolt of Jamaica crosses the finish line to win gold during the men's 200m final on Day 13 of the London 2012 Olympic Games at Olympic Stadium in London, England, August 9, 2012.

Tunisia's Oussama Mellouli swims on his way to gold during the men's 10-kilometer swimming marathon at the 2012 Summer Olympics, Aug. 10, 2012 in London.

Ariane Friedrich of Germany competes during the Women's high jump qualification on Day 13 of the London 2012 Olympic Games at Olympic Stadium in London, England, Aug. 9, 2012.

Daria Dmitrieva of Russia competes in the individual all-around gymnastics rhythmic at the 2012 Olympics Games at Wembley Arena, Aug. 9, 2012 in London, England.

The Olympic Cauldron burns as athletes compete during the men's 4 x 400m relay round 1 heats on Day 13 of the London 2012 Olympic Games at Olympic Stadium, Aug. 9, 2012 in London, England.

Dmitriy Karpov of Kazakhstan competes during the men's decathlon discus throw on Day 13 of the London 2012 Olympic Games at Olympic Stadium in London, England, Aug. 9, 2012.

Candace Parker #15 of United States drives for a shot attempt against Lauren Jackson #15 of Australia during the Women's Basketball semifinal on Day 13 of the London 2012 Olympics Games at North Greenwich Arena in London, England, Aug. 9, 2012.

Marlene Harnois of France competes against Hedaya Wahba of Egypt during the quarterfinal Women's -57kg Taekwondo match at the 2012 Olympic Games at ExCeL, Aug. 9, 2012 in London, England.

Brazil's Renato Rezende competes during the BMX cycling seeding run at the 2012 Summer Olympics, Aug. 8, 2012, in London.

United States' Jason Richardson leads Cuba's Orlando Ortega and Britain's Lawrence Clarke during their men's 110-meter hurdles semifinal at the 2012 Summer Olympics, London, Aug. 8, 2012.

In this photo made with a slow shutter speed, Gerco Schroder, of the Netherlands, prepares to jump a fence with his horse London, during the equestrian individual show jumping competition at the 2012 Summer Olympics, Aug. 8, 2012, in London.

Canada's Carol Huynh, top, takes down Isabelle Sambou of Senegal, during a 48-kg women's freestyle wrestling bronze medal match at the 2012 Summer Olympics,Aug. 8, 2012, in London.

Jamaica's Richard Phillips reacts after knocking a hurdle in a men's 110-meter hurdles semifinal during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Aug. 8, 2012.

Olivia Federici and Jenna Randall of Great Britain compete in the Women's Duets Synchronised Swimming Free Routine Preliminary on Day 10 of the 2012 London Olympic Summer Games at the Aquatics Centre on Aug. 6, 2012 in London, England.

Dimitrij Ovtcharov of Germany in action against Long Ma of China during the men's team table tennis semifinals on Day 10 of the 2012 London Olympic Games at ExCeL on Aug. 6, 2012 in London, England.

Isaac Botella Perez of Spain competes in the Artistic Gymnastics Men's Vault final on Day 10 of the 2012 LOndon Olympic Summer Games at North Greenwich Arena on Aug. 6, 2012 in London, England.

Damian Janikowski of Poland competes with Karam Mohamed Gaber Ebrahim of Egypt during their Men's Greco-Roman 84 kg Wrestling Semi Final on Day 10 of the 2012 London Olympic Summer Games at ExCeL on Aug. 6, 2012 in London, England.

South Korea's Eom Hyowon, right, vies with a Danish player during the men's preliminary Group B handball match Denmark vs South Korea for the 2012 Londn Olympic Summer Games on Aug. 6, 2012 at the Copper Box hall in London, England.

Cyclists compete during the 2012 London Olympic Summer Games women's omnium 20km points race cycling event at the Velodrome in the Olympic Park in East London on Aug. 6, 2012 in London, England.

Plancarte Delgado and Nuria Diosdado of Mexico compete in the Women's Duets Synchronized Swimming Technical Routine on Day 9 of the London 2012 Olympic Games at the Aquatics Centre on Aug. 5, 2012.

Jacob Dalton of the United States competes on the floor during the Artistic Gymnastics Men's Floor Exercise Final on Day 9 of the London 2012 Olympic Games at North Greenwich Arena on Aug. 5, 2012 in London, England.

Lisa Jane Weightman of Australia during the women's marathon on Day 9 of the London 2012 Olympic Games on Aug. 5, 2012.

Japan's Miyake Ryo, left, in a fencing match against Germany's Peter Joppich during the men's foil team semifinals at the London 2012 Olympic games, on Aug. 5, 2012.

General view during the Men's 400m Round 1 Heats on Day 8 of the London 2012 Olympic Games at Olympic Stadium on Aug. 4, 2012 in London, England.

Katja Dieckow of Germany competes in the Women's 3m Springboard Diving Semifinal on Day 8 of the London 2012 Olympic Games at the Aquatics Centre on Aug. 4, 2012 in London, England.

Christina Loukas of the United States competes in the Women's 3m Springboard Diving Semifinal on Day 8 of the London 2012 Olympic Games at the Aquatics Centre on Aug. 4, 2012 in London, England.

A Lam Shin of Korea competes against Maya Lawrence of USA during the Women's Epee Team Fencing semifinal on Day 8 of the London 2012 Olympic Games at ExCeL on August 4, 2012 in London, England.

Victoria Voronina of Russia competes in the Trampoline on Day 8 of the London 2012 Olympic Games at North Greenwich Arena on Aug. 4, 2012 in London, England.

Alejandro Madorno of Argentina riding Milano de Flore competes in the 1st Qualifier of Individual Jumping on Day 8 of the London 2012 Olympic Games at Greenwich Park on August 4, 2012 in London, England.

Senegal's forward challenges Mexico's midfielder Jorge Enriquez (L) and Mexico's defender Darvin Chavez (C) for the ball in the quarterfinal of the Men's football match between Mexico and Senegal at Wembley Stadium in London on Aug. 4, 2012 during the London 2012 Olympic Games.

Gabrielle Douglas of the United States competes on the balance beam in the Artistic Gymnastics Women's Individual All-Around final on Day 6 of the London 2012 Olympic Games at North Greenwich Arena, Aug. 2, 2012 in London, England.

Nadine Broersen of Netherlands competes in the Women's Heptathlon High Jump on Day 7 of the London 2012 Olympic Games at Olympic Stadium, Aug. 3, 2012 in London.

Gold medallist China's Dong Dong performs during the men's trampoline finals at the 2012 Summer Olympics, Aug. 3, 2012, in London.

The United States team throw their cox Mary Whipple into the water as they celebrate with their gold medals during the medal ceremony after the Women's Eight final on Day 6 of the London 2012 Olympic Games at Eton Dorney, Aug. 2, 2012 in Windsor, England.

Great Britain post a new world record time during Men's Team Pursuit Track Cycling Qualifying on Day 6 of the London 2012 Olympic Games at Velodrome, Aug. 2, 2012 in London, England.

Denmark's Lotte Friis starts in a women's 800-meter freestyle swimming heat at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Aug. 2, 2012.

United States' Tyler Clary celebrates winning gold in the men's 200-meter backstroke swimming final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Aug. 2, 2012.

Georgi Bratoev #1,Todor Aleksiev #15 and Nikolay Nikolov #18 of Bulgaria wait for the serve in the second set against Australia during Men's Volleyball on Day 6 of the London 2012 Olympic Games at Earls Court, Aug. 2, 2012 in London, England.

Kayla Harrison of the United States reacts while competing against Mayra Aguiar of Brazil, (in white), during the women's 78-kg judo competition at the 2012 Summer Olympics, Aug. 2, 2012, in London.

Trinidad's George Richard Bovell, right, goes to touch ahead of South Africa's Roland Schoeman in the men's 50-meter freestyle swimming semifinal at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Aug. 2, 2012.

Ruoqi Hui #4 of China spikes the ball as Jordan Larson #10 and Christa Harmotto #13 of United States defend during Women's Volleyball on Day 5 of the London 2012 Olympic Games at Earls Court, August 1, 2012 in London, England.

Croatian centre Marija Vrsaljko, left, vies with Czech centre Petra Kulichova and Czech forward Jana Vesela, right, during the women's preliminary round group A basketball match of the London 2012 Olympic Games Croatia vs Czech Republic, August 1, 2012 at the basketball arena in London.

Peter Burling and Blair Tuke of New Zealand compete in the Men's 49er Sailing on Day 5 of the London 2012 Olympic Games at the Weymouth & Portland Venue at Weymouth Harbour, August 1, 2012 in Weymouth, England.

Shannon Vreeland, Missy Franklin, Allison Schmitt and Dana Vollmer of the United States celebrate next to team Australia after the UNited States won the Final of the Women's 4x200m Freestyle Relay on Day 5 of the London 2012 Olympic Games at the Aquatics Centre on August 1, 2012 in London, England.

Byungchul Choi of Korea, left, fences with Erwan Le Pechoux of France in the men's foil competition at the ExCel exhibition center at the London Summer Olympics, July 31, 2012.

Tamsin Hinchley of Australia dives for a shot during the women's beach volleyball preliminary match between Australia and Austria at Horse Guards Parade in London, July 30, 2012.

Victoria Komova of Russia competes on the uneven bars in the artistic gymnastics women's team final on Day 4 of the London Olympic Games at North Greenwich Arena, July 31, 2012.

Kasumi Ishikawa of Japan serves during the women's singles table tennis quarter-final match against Yuegu Wang of Singapore in London, England, July 31, 2012.

Left to right, Rebecca Soni of the United States, Ruta Meilutyte of Lithuania and Iuliia Efimova of Russia compete in the final of the women's 100m breaststroke at the Aquatics Centre in London, England, July 30, 2012.

Jamel Herring of United States, right, in action with Daniyar Yeleussinov of Kazakhstan during the men's light weight Boxing in London, England, July 31, 2012.

Vittoria Panizzon of Italy stumbles on Borough Pennyz in the individual eventing cross country equestrian on Day 3 of the London 2012 Olympic Games at Greenwich Park in London, England, July 30, 2012.

North Korea's Kim Un Guk won the gold medal in the men's weightlifting 62kg competition.

Japan's gymnast Asuka Teramoto performs on the beam during the women's team final of the artistic gymnastics event of the London Olympic Games, July 31, 2012.

Christinna Pedersen and Kamilla Rytter Juhl of Denmark celebrate victory in their Women's Doubles Badminton match against Yunlei Zhao and Qing Tian of China at the London 2012 Olympic Games, July 31, 2012.

Takuya Haneda of Japan competes in the men's canoe single semi-final at Lee Valley White Water Center in London, England, July 31, 2012.