Bradley Wiggins leads his teammates and the rest of the pack during the Men's Road Cycling race at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Alexander Vinokourov of Kazakhstan won the gold medal as Rigoberto Uran of Colombia took silver, and Alexander Kristoff of Norway claiming the bronze medal. (AP Photo/Lefteris Pitarakis)

Italy's Valentina Vezzali, right, competes against Korea's Nam Hyun Hee during a bronze medal fencing match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Morry Gash)

Italy's Valentina Vezzali, right, competes against Korea's Nam Hyun Hee during a bronze medal fencing match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Morry Gash)

Rigoberto Uran of Colombia crosses the finish line to win the silver medal in the Men's Road Cycling race at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Alexander Vinokourov of Kazakhstan won th gold medal and Alexander Kristoff of Norway claimed the bronze. (AP Photo/Christophe Ena)

Arsen Galstyan of Russia, celebrates winning the gold medal over Hiroaki Hiraoka, of Japan, in the men's 60kg judo competition at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Paul Sancya)

Hiroaki Hiraoka, of Japan, throws Arsen Galstyan, of Russia, to the mat in the men's 60kg judo championship match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Galstyan won the gold medal. (AP Photo/Paul Sancya)

Arsen Galstyan of Russia, left, throws Hiroaki Hiraoka, of Japan, in the men's 60kg judo championship match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Galstyan won the gold medal. (AP Photo/Paul Sancya)

In this photo made with a slow shutter speed, Athletes compete during the Men's Road Cycling race at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Alexander Vinokourov of Kazakhstan won the gold medal, Rigoberto Uran of Colombia took the silver and Alexander Kristoff of Norway got the bronze.(AP Photo/Lefteris Pitarakis)

Cyclists ride along the path at Box Hill during the Men's Road Cycling race at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Alexander Vinokourov of Kazakhstan won the gold medal as Rigoberto Uran of Colombia took silver, and Alexander Kristoff of Norway claiming the bronze medal. (AP Photo/Lefteris Pitarakis)

A police officer stands by the road at Box Hill, during the Men's Road Cycling race at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Alexander Vinokourov of Kazakhstan won the gold medal, Rigoberto Uran of Colombia took the silver and Alexander Kristoff of Norway got the bronze.(AP Photo/Lefteris Pitarakis)

In this photo made with a slow shutter speed, Athletes compete during the Men's Road Cycling race at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Alexander Vinokourov of Kazakhstan won the gold medal, Rigoberto Uran of Colombia took the silver and Alexander Kristoff of Norway got the bronze.(AP Photo/Lefteris Pitarakis)

Sungbaek Park, of Korea, competes in the Men's Road Cycling race at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Alexander Vinokourov of Kazakhstan won the gold medal as Rigoberto Uran of Colombia took silver, and Alexander Kristoff of Norway claiming the bronze medal. (AP Photo/Lefteris Pitarakis)

Fans cheer on cyclists as they ride along the path at Box Hill during the Men's Road Cycling race at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Alexander Vinokourov of Kazakhstan won the gold medal as Rigoberto Uran of Colombia took the silver and Alexander Kristoff of Norway claimed bronze. (AP Photo/Lefteris Pitarakis)

Cyclists ride along Box Hill in the Men's Road Cycling race at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Alexander Vinokourov of Kazakhstan won the gold medal as Rigoberto Uran of Colombia took silver, and Alexander Kristoff of Norway claiming the bronze medal. (AP Photo/Lefteris Pitarkis)

Cyclists ride along the path at Box Hill during the Men's Road Cycling race at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Alexander Vinokourov of Kazakhstan won the gold medal as Rigoberto Uran of Colombia took the silver and Alexander Kristoff of Norway claimed bronze. (AP Photo/Lefteris Pitarakis)

Poland's Mateusz Polaczyk trains for the men's K-1 kayak slalom at the Lee Valley White Water Center at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Victor R. Caivano)

Italy's Marco Galiazzo, right, shoots for a gold medal in the team category as teammate Mauro Nespoli, at left, looks on during the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Marcio Jose Sanchez)

Hiromi Miyake of Japan competes during the women's 48kg weightlifting competition at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Miyake won the silver medal. (AP Photo/Hassan Ammar)

Italy's Mauro Nespoli shoots for a gold medal in the team category during the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Marcio Jose Sanchez)

Italy's Michele Francilli shoots for a gold medal in the team category during the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Marcio Jose Sanchez)

Brazil's Star crew Bruno Prada and Robert Scheidt, left, Poland's Star crew Mateusz Kusznierewicz and Dominik Zycki train during an official practice race at the London 2012 Summer Olympics, Saturday, July 28, 2012, in Weymouth and Portland. (AP Photo/Bernat Armangue)

Chun Hwa Ryang of North Korea competes during the women's 48kg weightlifting competition at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Chun Hwa Ryang won the bronze medal. (AP Photo/Hassan Ammar)

Hiromi Miyake of Japan competes during the women's 48kg weightlifting competition at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Miyake won the silver medal. (AP Photo/Hassan Ammar)

Star crew Mateusz Kusznierewicz, background, and Dominik Zycki, from Poland, train before an official practice race during the London 2012 Summer Olympics, Saturday, July 28, 2012, in Weymouth and Portland. (AP Photo/Bernat Armangue)

Italy's Mauro Nespoli, center, hugs teammate Michelle Francilli, right, after Italy's win over the United States gave them the gold medal in the team category during the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Marcio Jose Sanchez)

Italy's Mauro Nespoli, left, Marco Galiazzo, second from right, and Michelle Francilli, right, celebrate their win over the United States which gave them the gold medal in the team category during the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Marcio Jose Sanchez)

Chun Hwa Ryang of North Korea competes during the women's 48kg weightlifting competition at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Chun Hwa Ryang won the bronze medal. (AP Photo/Hassan Ammar)

Chun Hwa Ryang of North Korea competes during the women's 48kg weightlifting competition at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Chun Hwa Ryang won the bronze medal. (AP Photo/Hassan Ammar)

Hiromi Miyake of Japan competes during the women's 48kg weightlifting competition at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Miyake won the silver medal. (AP Photo/Hassan Ammar)

Hiromi Miyake of Japan competes during the women's 48kg weightlifting competition at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Miyake won the silver medal. (AP Photo/Hassan Ammar)

Star crew Mateusz Kusznierewicz and Dominik Zycki, from Poland, train before an official practice race during the London 2012 Summer Olympics, Saturday, July 28, 2012, in Weymouth and Portland. (AP Photo/Bernat Armangue)

Kanae Ikehata of Japan, left, and Sylwia Gruchala of Poland compete in the round of 32 during women's fencing at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Dmitry Lovetsky)

Poland's Adam Cwalina, right, and Michal Logosz plays against South Korea's Ko Sung-hyun and Yoo Yeon-seong in a men's doubles badminton match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Andres Leighton)

Natalia Partyka of Poland prepares to serve against Mie Skov of Denmark in the second round of the women's singles table tennis at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Partyka was born without part of her arm and competes at the International level. (AP Photo/Sergei Grits)

Natalia Partyka of Poland prepares to serve against Mie Skov of Denmark in the second round of the women's singles table tennis at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Partyka was born without part of her arm and competes at the International level. (AP Photo/Sergei Grits)

Natalia Partyka of Poland prepares to serve against Mie Skov of Denmark in the second round of the women's singles table tennis at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Partyka was born without part of her arm and competes at the International level. (AP Photo/Sergei Grits)

Natalia Partyka of Poland prepares to serve against Mie Skov of Denmark in the second round of the women's singles table tennis at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Partyka was born without part of her arm and competes at the International level. (AP Photo/Sergei Grits)

Natalia Partyka of Poland celebrates her win against Mie Skov of Denmark in the second round of the women's singles table tennis at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Partyka was born without part of her arm and competes at the International level. (AP Photo/Sergei Grits)

Sheree Charalampous of London wears a hat with a cutout of a cyclist as she watches the Artistic Gymnastics men's qualification at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Alexander Vinokourov sprung the first surprise of the London Olympics. The 38-year-old Kazakh defeated the British cycling "dream team" on his own, winning the gold medal in the men's road race to crown the end of a 14-year career that saw him in the roles of both hero and villain. (AP Photo/Julie Jacobson)

South Korea's Park Tae-hwan reacts after competing in the men's 400-meter freestyle swimming final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Saturday, July 28, 2012. Park won the silver medal for the event. (AP Photo/Lee Jin-man)

Sun Yang of China celebrates his gold medal finish in the 400 metre men's freestyle at the Aquatic Centre in the Olympic Village at the 2012 Summer Olympics in London on Saturday, July 28, 2012. (AP Photo/The Canadian Press, Sean Kilpatrick)

Members of Australia's women's relay team embrace after winning the gold medal in the women's 4x100-meter freestyle relay swimming final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Saturday, July 28, 2012. From left: Brittany Elmslie, Melanie Schlanger, Cate Campbell, and Alicia Coutts. (AP Photo/Matt Slocum)

Sun Yang of China celebrates his gold medal finish in the 400 metre men's freestyle at the Aquatic Centre in the Olympic Village at the 2012 Summer Olympics in London on Saturday, July 28, 2012. (AP Photo/The Canadian Press,Sean Kilpatrick

Australia's women's relay team members Cate Campbell, left, Alicia Coutts, right, and Melanie Schlanger, bottom, celebrate their gold medal win in the women's 4x100-meter freestyle relay swimming final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Saturday, July 28, 2012.(AP Photo/Lee Jin-man)

Italy's Valentina Vezzali reacts after defeating South Korea's Nam Hyun-hee during the bronze medal fencing match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London.(AP Photo/Dmitry Lovetsky)

Italy's Valentina Vezzali kisses the ground after defeating South Korea's Nam Hyun-hee during the bronze medal fencing match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London.(AP Photo/Dmitry Lovetsky)

Victoria Zhilinskayte of Russia, center, takes a shot at goal as Angola's Nair Almeida, left, and Natalia Bernardo, right, watch during their women's handball preliminary match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Vadim Ghirda)

Felipe Kitadai of Brazil celebrates after competing against Tumurkhuleg Davaadorj of Mongolia during the elimination round of the men's 60kg judo competition at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Paul Sancya)

Natalia Sheppard of Great Britain, left and Sophie Troiano of Great Britain compete in the of round 64 during women's fencing at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Sheppard won. (AP Photo/Dmitry Lovetsky)

Japan's Kosuke Hagino competes in a men's 400-meter individual medley at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Saturday, July 28, 2012. (AP Photo/David J. Phillip)

Japan's Takahuru Furukawa aims for the target during the team elimination stage at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Marcio Jose Sanchez)

Britain's Hannah Miley, center, swims in a women's 400-meter individual medley heat at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Saturday, July 28, 2012. (AP Photo/David J. Phillip)

USA's Timothy Wang takes a shot against Korea's Kim Song Nam during a table tennis preliminary round match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Sergei Grits)

China and Czech Republic compete during the second half of a preliminary women's basketball game at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Eric Gay)

China's Chen Nan (15) and Czech Republic's Hana Horakova, right, struggle for control of the ball during the second half of a preliminary women's basketball game at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Eric Gay)

United States' Dana Vollmer stretches before swimming in a women's 100-meter butterfly heat at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Saturday, July 28, 2012. (AP Photo/Mark J. Terrill)

Germany's, left to right on top, Eric Johannesen, Andreas Kuffner and Filip Adamsk pass Netherlands' Peter Wiersum Mitchel Steenman, right, after a men's rowing eight heat in Eton Dorney, near Windsor, England, at the 2012 Summer Olympics, Saturday, July 28, 2012. (AP Photo/Natacha Pisarenko)

Hungary's Katinka Hosszu swims in a women's 400-meter individual medley heat at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Saturday, July 28, 2012. (AP Photo/David J. Phillip)

The pack rides past Buckingham Palace during the Men's Road Cycling race at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Matt Rourke)

Italy's, left to right, Martino Goretti, Marcello Miani, Andrea Caianiello and Daniele Danesin during a lightweight men's rowing four heat in Eton Dorney, near Windsor, England, at the 2012 Summer Olympics, Saturday, July 28, 2012. (AP Photo/Armando Franca)

India's Rahul Banerjee shoots during the elimination stage at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Marcio Jose Sanchez)

Britain's Simon Terry aims during the elimination stage at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Marcio Jose Sanchez)

The peloton passes by The Mall by Buckingham Palace at the start of the the men's road road cycling race at the 2012 Summer Olympics on Saturday, July 28, 2012, in London. (AP Photo/Daniel Berehulak, Pool)

Ukraine's Viktor Ruban shoots during the team elimination stage at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Marcio Jose Sanchez)

An Australian rider leads the opening group of cyclists in the Cycle Road Race as it passes Hampton Court in the London Olympics on Saturday July 28, 2012. (AP Photo/Mark Allan)

Britain's Bradley Wiggins signs the start list prior to the Men's Road Cycling race at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Christophe Ena)

Arianna Errigo of Italy, left, and Johana Beatriz Fuenmayor Choles of Venezuela compete in the round of 32 during women's fencing at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Andrew Medichini)

A judge watches South Korean gymnast Kim Soo-myun perform on the parallel bars during the Artistic Gymnastic men's qualification at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Julie Jacobson)

Canada's Scott Dickens reacts after swimming a men's 100-meter breaststroke heat at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Saturday, July 28, 2012. (AP Photo/Mark J. Terrill)

Hiroaki Hiraoka of Japan competes against Artiom Arshanski of Israel (in blue) during the elimination round of the men's 60kg judo competition at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Paul Sancya)

China's Zhang Lei (17) serves to Serbia during a women's volleyball preliminary match at the 2012 Summer Olympics, at Earls Court Saturday, July 28, 2012, in London. (AP Photo/Chris O'Meara)

Latvian gymnast Dmitrijs Trefilovs, foreground, performs on the floor as South Korean gymnast Kim Hee-hoon, rear, performs on the vault during the Artistic Gymnastic men's qualification at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Gregory Bull)

Janko Tipsarevic of Serbia serves to David Nalbandian at the All England Lawn Tennis Club at Wimbledon, in London, at the 2012 Summer Olympics, Saturday, July 28, 2012. (AP Photo/Mark Humphrey)

Japan's Kosuke Kitajima, right, and Japan's Ryo Tateishi dive to swim a men's 100-meter breaststroke heat at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Saturday, July 28, 2012. (AP Photo/Mark J. Terrill)

Hyun Hee Nam of South Korea, left, and Olga Leleyko of Ukraine compete in the round of 32 during women's fencing at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Dmitry Lovetsky)

Germany's, left to right, Tim Grohmann, Lauritz Schoof, Phillipp Wende and Karl Schulze in the men's quadruple rowing sculls in Eton Dorney, near Windsor, England, at the 2012 Summer Olympics, Saturday, July 28, 2012. (AP Photo/Chris Carlson)

The German boat heads to the start of the men's rowing pair heat in Eton Dorney, near Windsor, England, at the 2012 Summer Olympics, Saturday, July 28, 2012. (AP Photo/Armando Franca)

Czech Republic's Katerina Emmons shoots during the women's 10-meter air rifle final at the 2012 Summer Olympics, Saturday, July 28, 2012, in London.(AP Photo/Rebecca Blackwell)

Great Britain's gymnast Daniel Purvis performs on the parallel bars during the Artistic Gymnastic men's qualification at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Gregory Bull)

Mexico Luis Velez, right, shoots as teammate Juan Serrano watches during the team elimination stage at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Marcio Jose Sanchez)

Britain's Bradley Wiggins leads his team leads his team behind Miguel Ubeto Aponte of Venezuela during the men's road cycling race at the 2012 Summer Olympics on Saturday, July 28, 2012, in London. (AP Photo/Daniel Berehulak, Pool)

The Russian, bottom, and Estonian boats race during a men's quadruple rowing sculls heat in Eton Dorney, near Windsor, England, at the 2012 Summer Olympics, Saturday, July 28, 2012. (AP Photo/Natacha Pisarenko)

Serbia's Stefana Veljkovic (11) takes a pass from teammate Maja Ognjenovic (10) to spike the ball towards China defenders Wei Qiuyue (8) and Yang Junjing (9) during a women's volleyball preliminary match at the 2012 Summer Olympics, at Earls Court Saturday, July 28, 2012, in London. (AP Photo/Chris O'Meara)

Italy's Michele Frangilli shoots during the elimination stage at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Marcio Jose Sanchez)

China's Yang Junjing (9) spikes the ball at Serbia's Ivana Djerisilo (3) and Stefana Veljkovic (11) during a women's volleyball preliminary match at the 2012 Summer Olympics, at Earls Court Saturday, July 28, 2012, in London. (AP Photo/Chris O'Meara)

USA's Joseph Diaz Jr., right, fights Ukraine's Pavlo Ishchenko during a men's bantam 56 kg preliminary boxing match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Morry Gash)

Boats from, bottom to top, Mexico, USA, Belarus, Algeria, and Russia, move to the starting line during a women's rowing single sculls heat in Eton Dorney, near Windsor, England, at the 2012 Summer Olympics, Saturday, July 28, 2012. (AP Photo/Chris Carlson)

Germany's Martin Sauer, Kristof Wilke, Florian Mennigen, Lukas Mueller, Richard Schmidt, Maximilian Reinelt, Eric Johannesen, Andreas Kuffner and Filip Adamski, bottom, and Great Britain's Phelan Hill, Constantine Louloudis, Matthew Langridge, Greg Searle, Mohamed Sbihi, Richard Egington, Tom Ransley, James Ford, and Alex Partridge compete during a men's rowing eight heat in Eton Dorney, near Windsor, England, at the 2012 Summer Olympics, Saturday, July 28, 2012. (AP Photo/Natacha Pisarenko)

Belarus's Tim Maeyens passes an Olympic sign during a men's rowing single sculls heat in Eton Dorney, near Windsor, England, at the 2012 Summer Olympics, Saturday, July 28, 2012. (AP Photo/Chris Carlson)

China's Li Xuerui, shapes up to smash a shuttle cock while playing against Claudia Modenesi Rivero of Peru, unseen, at a women's singles badminton match of the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Saurabh Das)

Serena Williams of the United States slips on the grass against Jelena Jankovic of Serbia during a first round match at the All England Lawn Tennis Club in Wimbledon, London at the 2012 Summer Olympics, Saturday, July 28, 2012. (AP Photo/Elise Amendola)

Japan's Mana Iwabuchi, right, battles for the ball against Sweden's Lina Nilsson, left, during the group F women's soccer match between Japan and Sweden at the London 2012 Summer Olympics, in Coventry, England, Saturday, July 28, 2012. (AP Photo/Hussein Malla)

Japan's Haruna Sakakibara maneuvers her boat on Dorney Lake during women's rowing single sculls heats in Eton Dorney, near Windsor, England, at the 2012 Summer Olympics, Saturday, July 28, 2012. (AP Photo/Natacha Pisarenko)

Penggen Wu, right, from China tries to block Sascha Heyer, left, from Switzerland during their Beach Volleyball match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Petr David Josek)

Competitors shoot during qualifiers for the women's 10-meter air rifle event at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Rebecca Blackwell)

Hiroaki Hiraoka of Japan competes against Sofiane Milous of France (in blue) during the quarterfinal round of the men's 60kg judo competition at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Paul Sancya)

USA's Joseph Diaz Jr., top, reacts after defeating Ukraine's Pavlo Ishchenko in a men's bantam 56 kg preliminary boxing match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Morry Gash)

Scott Parsons of the United States during a training session for the men's K-1 kayak slalom at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Kirsty Wigglesworth)

Boats from, bottom to top, Russia, Algeria, Belarus, the U.S., and Mexico are held in place before the start of a women's rowing single sculls heat in Eton Dorney, near Windsor, England, at the 2012 Summer Olympics, Saturday, July 28, 2012. (AP Photo/Natacha Pisarenko)

United States swimmer Ryan Lochte dives off of the starting block during the men's 400-meter individual medley event during the 2012 Summer Olympics at the Aquatics Centre in London on Saturday, July 28, 2012, in London. (AP Photo/Al Bello, Pool)

Boats, bottom to top, from Australia, the U.S., and Canada pass the Olympic rings during a men's rowing pair heat in Eton Dorney, near Windsor, England, at the 2012 Summer Olympics, Saturday, July 28, 2012. (AP Photo/Chris Carlson)

Swiss gymnast Claudio Capelli performs on the horizontal bar during the Artistic Gymnastics men's qualification at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Matt Dunham)

China's Li Xuerui, plays against Claudia Modenesi Rivero of Peru, unseen, at a women's singles badminton match of the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Saurabh Das)

Ander Elosegi of Spain during a training session for the men's C-1 canoe slalom at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Kirsty Wigglesworth)

Russia's Sergey Vodopiyanov fights Argentina's Alberto Ezequiel Melian, left, during a men's bantam 56-kg preliminary boxing match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Ivan Sekretarev)

India's Jwala Gutta, left, and Japan's Mizuki Fujii play at a women's doubles badminton match of the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Gutta's partner Ashwini Ponnappa and Fujii's, reika Kakiiwa, are unseen. (AP Photo/Saurabh Das)

Serena Williams of the United States returns returns the ball against Jelena Jankovic of Serbia during a first round match at the All England Lawn Tennis Club in Wimbledon, London at the 2012 Summer Olympics, Saturday, July 28, 2012. (AP Photo/Elise Amendola)

USA's Joseph Diaz Jr. makes his way to the ring to fight Ukraine's Pavlo Ishchenko in a men's bantam 56-kg preliminary boxing match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Patrick Semansky)

Russia's Sergey Vodopiyanov fights Argentina's Alberto Ezequiel Melian, left, during a men's bantam 56-kg preliminary boxing match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Ivan Sekretarev)

Russia's Sergey Vodopiyanov reacts after defeating Argentina's Alberto Ezequiel Melian, left, in a men's bantam 56-kg preliminary boxing match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Ivan Sekretarev)

Kazakhstan's Alexandr Vinokourov chases Rigoberto Uran of Colombia past Buckingham Palace in the Men's Road Cycling race at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Vinokourov won the race with Rigoberto Uran of Colombia taking the silver, and Alexander Kristoff of Norway claiming bronze. (AP Photo/Matt Rourke)

Japanese gymnast Kazuhito Tanaka falls off the pommel horse as he performs during the Artistic Gymnastics men's qualification at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Gregory Bull)

China's Zhang Xiuyun finishes a stroke during a women's rowing single sculls heat in Eton Dorney, near Windsor, England, at the 2012 Summer Olympics, Saturday, July 28, 2012. (AP Photo/Natacha Pisarenko)

Xu Linyin of China serves during a beach volleyball match against Switzerland in a beach volleyball match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Dave Martin)

A South Korean women's field hockey player walks on the Riverbank Arena pitch during a practice session for the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Eranga Jayawardena)

Riders pass through Richmond Park during the men's road cycling race at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Alastair Grant)

Angola's Ngiendula Filipe, left, and Turkey's Bahar Caglar, right, scramble for control of the ball during the first half of a preliminary women's basketball game at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Eric Gay)

Britain's Lynne Beattie (10) shoots over Russia's Evgeniya Startseva (13) and Maria Perepelkina (3) during a women's volleyball preliminary match at the 2012 Summer Olympics Saturday, July 28, 2012, in London. (AP Photo/Chris O'Meara)

In this multiple exposure photo, U.S. gymnast Samuel Mikulak performs on the floor during the Artistic Gymnastics men's qualification at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Julie Jacobson)

In this multiple exposure photo, U.S. gymnast Danell Leyva performs on the floor at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Julie Jacobson)

This multiple exposure photo shows Italy's Elisa Di Francisca, left, and Korea's Nam Hyun Hee competing during a semifinal fencing match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Andrew Medichini)

United States' Tiana Courdray rides Ringwood Magister out of the arena after competing in the equestrian eventing competition at the 2012 London Olympics Saturday, July 28, 2012, at Greenwich Park in London. (AP Photo/Charlie Riedel)

Elliot 6m crew Tamara Echegoyen, Angela Pumariega and Sofia Toro train before an official practice race during the London 2012 Summer Olympics, Saturday, July 28, 2012, in Weymouth and Portland. (AP Photo/Bernat Armangue)

Fans cheer for Mary King, of Great Britain, after she competes with her horse Imperial Cavalier in the equestrian eventing dressage phase at Greenwich Park, the site for the equestrian and modern pentathlon events at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Markus Schreiber)

South Korea's Jin Jong-oh, left, and China's Pang Wei shoot during the men's 10-meter air pistol event at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Jin went on to win the gold.(AP Photo/Rebecca Blackwell)

Andrew Hoy, of Australia, looks to the crowd after competing with his horse Rutherglen, in the equestrian eventing dressage phase at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/David Goldman)

General view of the Beach Volleyball venue at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Petr David Josek)

Ben Ainslie of Great Britain sails on a Finn dinghy class during the official practice race ahead of the London 2012 Summer Olympics, Saturday, July 28, 2012, in Weymouth and Portland venue. (AP Photo/Francois Mori)