United States' women's 4 x 100-meter relay team members from left, United States' Allyson Felix, Carmelita Jeter, Bianca Knight, and Tianna Madison pose with their national flag after their gold medal win during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. The United States relay team set a new world record with a time of 40.82 seconds.(AP Photo/Anja Niedringhaus)

United States' Carmelita Jeter reacts as she crosses the finish line to win the women's 4 x 100-meter relay during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. The United States relay team set a new world record with a time of 40.82 seconds.(AP Photo/Anja Niedringhaus)

United States' Carmelita Jeter reacts as she crosses the finish line to win the women's 4 x 100-meter relay during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. The United States relay team set a new world record with a time of 40.82 seconds.(AP Photo/Anja Niedringhaus)

United States' Deedee Trotter competes in a women's 4x400-meter relay heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Anja Niedringhaus)

United States' Carmelita Jeter reacts as she crosses the finish line to win the women's 4 x 100-meter relay during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. The United States relay team set a new world record with a time of 40.82 seconds.(AP Photo/Lee Jin-man)

United States' women's 4 x 100-meter relay team members from left, United States' Allyson Felix, Carmelita Jeter, Bianca Knight, and Tianna Madison pose with their national flag after their gold medal win during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. The United States relay team set a new world record with a time of 40.82 seconds.(AP Photo/Martin Meissner)

United States' Carmelita Jeter reacts as she crosses the finish line to win the women's 4 x 100-meter relay during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. The United States relay team set a new world record with a time of 40.82 seconds.(AP Photo/Lee Jin-man)

United States' Carmelita Jeter reacts after crossing the finish line to win the women's 4 x 100-meter relay during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. The United States relay team set a new world record with a time of 40.82 seconds.(AP Photo/Anja Niedringhaus)

Poland's Anita Wlodarczyk celebrates after winning silver in the women's hammer throw final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Matt Slocum)

Poland's Anita Wlodarczyk takes a throw in the women's hammer throw final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Matt Dunham)

Poland's Anita Wlodarczyk takes a throw in the women's hammer throw final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Matt Dunham)

Poland's Anita Wlodarczyk competes in the women's hammer throw final during the 2012 Summer Olympics at the Olympic Stadium, Friday, Aug. 10, 2012, in London. (AP Photo/Pawel Kopczynski, Pool)

Poland's Anita Wlodarczyk reacts after winning silver in the women's hammer throw final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Hassan Ammar)

Poland's Anita Wlodarczyk celebrates after the women's hammer throw during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Matt Slocum)

Poland's Anita Wlodarczyk competes in the women's hammer throw final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Matt Dunham)

Poland's Anita Wlodarczyk reacts after taking a throw in the women's hammer throw final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Matt Dunham)

Poland's Piotr Siemionowski competes in the men's kayak single 200-meter semifinal at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in Eton Dorney, near Windsor, England. (AP Photo/Jim Young, Pool)

Poland's Joanna Fiodorow competes in the women's hammer throw final during the 2012 Summer Olympics at the Olympic Stadium, Friday, Aug. 10, 2012, in London. (AP Photo/Pawel Kopczynski, Pool)

Poland's Lukasz Michalski competes in the men's pole vault final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Hassan Ammar)

Poland's Joanna Fiodorow competes in the women's hammer throw final during the 2012 Summer Olympics at the Olympic Stadium, Friday, Aug. 10, 2012, in London. (AP Photo/Pawel Kopczynski, Pool)

Poland's Piotr Siemionowski competes in the men's kayak single 200-meter semifinal at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in Eton Dorney, near Windsor, England. (AP Photo/Jim Young, Pool)

Spain's Pau Gasol, center, hauls down a rebound between Russia's Victor Khryapa, left, and Sergey Monya during a men's semifinals basketball game at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (AP Photo/Charles Krupa)

The team from Canada competes during the synchronized swimming team free routine final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Friday, Aug. 10, 2012. Canada finished fourth in the event. (AP Photo/Mark J. Terrill)

Alexander Kaun (8) of Russia dunks the ball while taking on Spain during a men's basketball semifinal game at the 2012 Summer Olympics on Friday, Aug. 10, 2012, in London. (AP Photo/Christian Petersen, Pool)

Spain's Pau Gasol, top, scores past Russia's Sasha Kaun during a men's basketball semifinal game at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (AP Photo/Victor R. Caivano)

Spain's Rudy Fernandez, left, collides with Russia's Alexey Shved, right, during a men's basketball semifinal game at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (AP Photo/Victor R. Caivano)

Spain's Pau Gasol, left, embraces his brother Marc after beating Russia during a men's semifinals basketball game at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (AP Photo/Charles Krupa)

Germany's Andreas Waschburger (8) rests after finishing the men's 10-kilometer marathon swimming competition in Hyde Park at the 2012 Summer Olympics Friday, Aug. 10, 2012, in London. (AP Photo/Charlie Riedel)

The team from Japan competes during the synchronized swimming team free routine final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Friday, Aug. 10, 2012. Japan finished fifth in the event. (AP Photo/Mark J. Terrill)

Athletes compete during the men's 10-kilometer swimming marathon at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (AP Photo/Andrew Medichini)

In this photo taken on Friday, Aug. 10, 2012, South Korea's Park Jong-woo holds up a banner reading "Dokdo is our Territory," referring to the largely uninhabited islets, midway between South Korea and Japan, after his team won their bronze medal men's soccer match against Japan, at the 2012 London Summer Olympics, at the Millennium Stadium in Cardiff, Wales. Park, who displayed his country's flag with the political slogan after the match should be barred from Saturday's medal ceremony, the IOC told team officials. FIFA statutes prohibit political statements being made at its matches, and the IOC generally only allows official national flags to be displayed at events. (AP Photo/Jon Super)

In this photo taken on Friday, Aug. 10, 2012, South Korea's Park Jong-woo holds up a banner reading "Dokdo is our Territory," referring to the largely uninhabited islets, midway between South Korea and Japan, after his team won their bronze medal men's soccer match against Japan, at the 2012 London Summer Olympics, at the Millennium Stadium in Cardiff, Wales. Park, who displayed his country's flag with the political slogan after the match should be barred from Saturday's medal ceremony, the IOC told team officials. FIFA statutes prohibit political statements being made at its matches, and the IOC generally only allows official national flags to be displayed at events. (AP Photo/Newsis) KOREA OUT

Bahamas's Ramon Miller, Michael Mathieu, Chris Brown and Demetrius Pinder celebrate their gold medal win in the men's 4x400-meter during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Matt Slocum)

Russia's Tatyana Lysenko takes a throw in the women's hammer throw final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Matt Dunham)

Argentina's Mariela Scarone reacts after being hit in the face during the women's field hockey gold medal match against the Netherlands at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (AP Photo/Bullit Marquez)

France's Thierry Omeyer saves a penalty shot during the men's handball semifinal match against Croatia at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (AP Photo/Vadim Ghirda)

Latvia's Rihards Veide (84) avoids a crash in a BMX cycling men's semifinal run during the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (AP Photo/Matt Rourke)

Spain's Nicolas Garcia Hemme fights Argentina's Sebastian Eduardo Crismanich (in red) during the gold medal match in men's 80-kg taekwondo competition at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (AP Photo/Ng Han Guan)

Columbian rider Mariana Pajon (right) at the start of the Olympic BMX race in which she went on to gain Gold at the 2012 Summer Olympics at the Olympic Stadium, London, on Friday, Aug. 10, 2012. (AP Photo/Mark Allan)

South Africa's Oscar Pistorius runs in the final leg of the men's 4 x 400-meter relay final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Anja Niedringhaus)

Kazakhstan's Adilbek Niyazimbetov, right, fights Ukraine's Oleksandr Gvozdyk, during their men's light heavyweight 81-kg semifinal boxing match at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (AP Photo/Ivan Sekretarev)

Baton change in the men's 4 x400-meters relay final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Daniel Ochoa De Olza)

German Sanchez Sanchez of Mexico dives during the men's 10-meter platform diving preliminaries at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Friday, Aug. 10, 2012. (AP Photo/Mark J. Terrill)

Qui Bo of China dives during the men's 10-meter platform diving preliminaries at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Friday, Aug. 10, 2012. (AP Photo/Mark J. Terrill)

Britain's players celebrate after winning the women's field hockey bronze medal match against New Zealand at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (AP Photo/Eranga Jayawardena)

United States' Morgan Uceny falls as Kenya's Hellen Onsando Obiri and Ethiopia's Abeba Aregawi try to avoid her during the women's 1500-meter final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Daniel Ochoa De Olza)

Venezuela's Omart Longart, left, and South Africa's Oscar Pistorius, center, wait for the batons during the men's 4x400-meter relay final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Matt Dunham)

Canada's Matthew Judah Gentry, competes against United States' Jordan Ernest Burroughs during a 74-kg men's freestyle wrestling competition at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (AP Photo/Paul Sancya)

China's Zhang Wenxiu takes a throw in the women's hammer throw final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Matt Dunham)

North Korea's Yang Kyong Il, in red, and Russia's Dzhamal Otarsultanov, in blue, compete during a 55-kg men's freestyle wrestling competition at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (AP Photo/Paul Sancya)

Ukraine's Taras Shelestyuk, left, fights Britain's Freddie Evans in a welterweight 69-kg semifinal boxing match at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (AP Photo/Patrick Semansky)

Britain's Hannah Macleod, right, and New Zealand's Samantha Charlton battle for possession of the ball during the women's field hockey bronze medal match at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (AP Photo/Bullit Marquez)

Colombia's Mariana Pajon, right, is pursued by New Zealand's Sarah Walker, left, in the BMX cycling women's final run during the 2012 Summer Olympics in London, Friday, Aug. 10, 2012. Pajon, a former world champion, has won the women's BMX competition at the London Olympics, giving Colombia its first gold of the games. (AP Photo/Christophe Ena)

United States' Justin Gatlin leads the field in a heat of the mens 4x100-meter relay during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Daniel Ochoa De Olza)

Ethiopia's Meseret Defar holds up a picture to her face after she won gold in the women's 5000-meter final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Matt Dunham)

Kazakhstan's Ivan Dychko, left, fights Britain's Anthony Joshua in a super heavyweight over 91-kg semifinal boxing match at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (AP Photo/Patrick Semansky)

Italy's Alex Giorgetti's bathing suit is torn at the end of a 9-7 victory over Serbia in a men's semifinal water polo match at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. Italy will play Croatia for the gold medal on Aug. 12. (AP Photo/Julio Cortez)

The Netherlands' players celebrate following their 2-0 win over Argentina in the women's field hockey gold medal match at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (AP Photo/Bullit Marquez)

Azerbaijan's Teymur Mammadov walks off with blood over his eye after losing to Italy's Clemente Russo in a heavyweight 91-kg semifinal boxing match at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (AP Photo/Patrick Semansky)

Poland's Joanna Mitrosz performs her ribbon program during the individual all-around qualifications of the rythmic gymnastics event of the London Olympic Games on August 10, 2012 at Wembley arena in London. AFP PHOTO / THOMAS COEX

Poland's Piotr Siemionowski competes in the men's kayak single (K1) men's 200m semifinals during the London 2012 Olympic Games, at Eton Dorney Rowing Centre, west of London, on August 10, 2012. AFP PHOTO / POOL - PHILIP BROWN

Poland's Piotr Siemionowski competes in the men's kayak single (K1) men's 200m semifinals during the London 2012 Olympic Games, at Eton Dorney Rowing Centre, west of London, on August 10, 2012. AFP PHOTO / POOL - JIM YOUNG

Poland's Joanna Mitrosz performs her ribbon program during the individual all-around qualifications of the rythmic gymnastics event of the London Olympic Games on August 10, 2012 at Wembley arena in London. AFP PHOTO / BEN STANSALL

Shiming Zou of China is declared victor over Paddy Barnes of Ireland in the men's Light Flyweight (48kg) boxing semi-finals of the 2012 London Olympic Games at the ExCel Arena August 10, 2012 in London. Shiming Zou advanced to the final on a close points decision. AFP PHOTO / Jack GUEZ

David Ayrapetyan of Russia (in red) defends against Kaeo Pongprayoon of Thailand (in blue) during the men's Light Flyweight (48kg) boxing semi-finals of the 2012 London Olympic Games at the ExCel Arena August 10, 2012 in London. AFP PHOTO / Jack GUEZ

Egypt's Yasmine Mohmed Rostom performs her clubs program during the individual all-around qualifications of the rythmic gymnastics event of the London Olympic Games on August 10, 2012 at Wembley arena in London. AFP PHOTO / BEN STANSALL

Australia's Janine Murray performs her clubs program during the individual all-around qualifications of the rythmic gymnastics event of the London Olympic Games on August 10, 2012 at Wembley arena in London. AFP PHOTO / BEN STANSALL

Kaeo Pongprayoon of Thailand (in blue) defends against David Ayrapetyan of Russia (in red) during the men's Light Flyweight (48kg) boxing semi-finals of the 2012 London Olympic Games at the ExCel Arena August 10, 2012 in London. Pongprayoon advanced to the final on a close 13-12 points decision. AFP PHOTO / Jack GUEZ

Azerbajian's Aliya Garayeva performs her ribbon program during the individual all-around qualifications of the rythmic gymnastics event of the London Olympic Games on August 10, 2012 at Wembley arena in London. AFP PHOTO / BEN STANSALL

Kaeo Pongprayoon of Thailand (in blue) defends against David Ayrapetyan of Russia (in red) during the men's Light Flyweight (48kg) boxing semi-finals of the 2012 London Olympic Games at the ExCel Arena August 10, 2012 in London. Pongprayoon advanced to the final on a close 13-12 points decision. AFP PHOTO / Jack GUEZ

Poland's Joanna Mitrosz performs her clubs program during the individual all-around qualifications of the rythmic gymnastics event of the London Olympic Games on August 10, 2012 at Wembley arena in London. AFP PHOTO / BEN STANSALL

Poland's Joanna Mitrosz performs her clubs program during the individual all-around qualifications of the rythmic gymnastics event of the London Olympic Games on August 10, 2012 at Wembley arena in London. AFP PHOTO / BEN STANSALL

Russia's Yury Postrigay (L) and Alexander Dyachenko compete in the kayak double (K2) 200m men's semifinal during the London 2012 Olympic Games, at Eton Dorney Rowing Centre in Eton, west of London, on August 10, 2012. AFP PHOTO / DAMIEN MEYER

US players listen to the coach Terry Schroeder (C) during the men's water polo semifinal 5-8 the US vs Spain at the London 2012 Olympic Games in London on August 10, 2012. AFP PHOTO / KHALED DESOUKI

Uzbekistan's Soslan Tigiev (R) wrestles Iran's Sadegh Saeed Goudarzi in their Men's 74kg Freestyle quarterfinal match on August 10, 2012 during the wrestling event of the London 2012 Olympic Games. AFP PHOTO / MARWAN NAAMANI

Swimmers compete in the men's 10km open water swimming marathon at the London 2012 Olympic Games at Hyde Park in London, on August 10, 2012. AFP PHOTO / LUIS ACOSTA

North Korea's Yang Kyong Il (up) wrestles Russia's Dzhamal Otarsultanov during their Men's 55kg Freestyle quarterfinal match on August 10, 2012 during the wrestling event of the London 2012 Olympic Games. AFP PHOTO / MARWAN NAAMANI

North Korea's Yang Kyong Il (R) wrestles Russia's Dzhamal Otarsultanov during their Men's 55kg Freestyle quarterfinal match on August 10, 2012 during the wrestling event of the London 2012 Olympic Games. AFP PHOTO / MARWAN NAAMANI

Australia's Malcolm Page (L) and Mathew Belcher (R) celebrate winning gold in the men's sailing 470 two person dinghy medal race at the London 2012 Olympic Games in Weymouth on August 10, 2012. AFP PHOTO / William WEST

Australia's Mathew Belcher (L) and Malcolm Page (R) celebrate winning gold in the men's sailing 470 two person dinghy medal race at the London 2012 Olympic Games in Weymouth on August 10, 2012. AFP PHOTO / William WEST

Tony Azevedo (R) of the US competes with Spain's David Martin Lozano (C) and Albert Espanol Lifante during the men's water polo semifinal 5-8 the US vs Spain at the London 2012 Olympic Games in London on August 10, 2012. AFP PHOTO / ADEK BERRY

Poland's Marta Walczykiewicz celebrates after competing in the kayak single (K1) 200m women's semifinals during the London 2012 Olympic Games, at Eton Dorney Rowing Centre in Eton, west of London, on August 10, 2012. AFP PHOTO / DAMIEN MEYER

Australia's Eloise Amberger, Australia's Sarah Bombell, Australia's Olia Burtaev, Australia's Jenny-Lyn Anderson, Australia's Tamika Domrow, Australia's Bianca Hammett, Australia's Tarren Otte and Australia's Samantha Reid compete in the team free routine final during the synchronised swimming competition at the London 2012 Olympic Games on August 10, 2012 in London. AFP PHOTO / MARTIN BUREAU

Japan's Shinichi Yumoto (L) wrestles Georgia's Vladimer Khinchegashvili during their Men's 55kg Freestyle semifinal match on August 10, 2012 during the wrestling event of the London 2012 Olympic Games. AFP PHOTO / YURI CORTEZ

Venezula's Stefany Hernandez comes off her bike during the BMX cycling women's semi-finals event at the London 2012 Olympic Games in the Olympic Park in east London on August 10, 2012. AFP PHOTO / CARL DE SOUZA

A member of the Australia's synchronised swimming team competes in the team free routine final during the synchronised swimming competition at the London 2012 Olympic Games on August 10, 2012 in London. AFP PHOTO / MARTIN BUREAU

Germany's Ronald Rauhe (front) and Jonas Ems compete in the kayak double (K2) 200m men's heats during the London 2012 Olympic Games, at Eton Dorney Rowing Centre in Eton, west of London, on August 10, 2012. AFP PHOTO / DAMIEN MEYER

South Korea's Son Yeon Jae performs her ribbon program during the individual all-around qualifications of the rythmic gymnastics event of the London Olympic Games on August 10, 2012 at Wembley arena in London. AFP PHOTO / THOMAS COEX

Iran's Sadegh Saeed Goudarzi (R) is declared the winner after defeating Hungary's Gabor Hatos in their Men's 74kg Freestyle semifinal match on August 10, 2012 during the wrestling event of the London 2012 Olympic Games. AFP PHOTO / MARWAN NAAMANI

Cyclists jump during heat 2 of the BMX cycling women's semi-finals event at the London 2012 Olympic Games in the Olympic Park in east London on August 10, 2012. AFP PHOTO / LEON NEAL

Photographers gather atop a hill to cover the action during the men's and women's BMX cycling semi-finals at the London 2012 Olympic Games in the Olympic Park in east London on August 10, 2012. AFP PHOTO / LEON NEAL

Iran's Sadegh Saeed Goudarzi (L) wrestles Hungary's Gabor Hatos in their Men's 74kg Freestyle semifinal match on August 10, 2012 during the wrestling event of the London 2012 Olympic Games. AFP PHOTO / MARWAN NAAMANI

Iran's Sadegh Saeed Goudarzi (L) wrestles Hungary's Gabor Hatos in their Men's 74kg Freestyle semifinal match on August 10, 2012 during the wrestling event of the London 2012 Olympic Games. AFP PHOTO / YURI CORTEZ

Spain's Irene Montruchhio Beuas, Spain's Paula Klamburg Roque, Spain's Andrea Fuentes Fache, Spain's Margalida Crespi Jaume, Spain's Clara Basiana Canellas, Spain's Ona Carbonell Ballestero, Spain's Alba Cabello Rodilla and Spain's Thais Henriquez Torres compete in the team free routine final during the synchronised swimming competition at the London 2012 Olympic Games on August 10, 2012 in London. AFP PHOTO / MARTIN BUREAU

Team Belarus performs in the group all-around qualifications of the rythmic gymnastics event of the London Olympic Games on August 10, 2012 at Wembley arena in London. AFP PHOTO / BEN STANSALL

South Korea's Hwang Kyung Seon (blue) fights against Germany's Helena Fromm during their women's taekwondo quarter-final bout in the category under 67 kg as part of the London 2012 Olympic games, on August 10, 2012 at the ExCel centre in London. AFP PHOTO / ALBERTO PIZZOLI

(L-R) France's Laetitia le Corguille, Venezuala's Stefany Hernandez, Australia's Caroline Buchanan, US BMX cyclist Brooke Crain and Britain's Shanaze Reade power down the track during the BMX cycling women's semi-finals event at the London 2012 Olympic Games in the Olympic Park in east London on August 10, 2012. AFP PHOTO / LEON NEAL

(L-R) Lativia's Maris Strombergs, France's Joris Daudet, Colombia's Carlos Mario Oquendo Zabala, Australia's Sam Willoughby and Switzerland's Roger Rinderknecht take a jump during the BMX cycling men's semi-finals event at the London 2012 Olympic Games in the Olympic Park in east London on August 10, 2012. AFP PHOTO / CARL DE SOUZA

France's Quentin Caleyron (3L) slides off his bike amid a pack of riders during the BMX cycling men's semi-finals event at the London 2012 Olympic Games in the Olympic Park in east London on August 10, 2012. AFP PHOTO / CARL DE SOUZA

The referee moves in as Clemente Russo of Italy (in blue) is knocked to the canvas by Teymur Mammadov of Azerbaijan (in red) during the men's Heavyweight (91kg) boxing semi-finals of the 2012 London Olympic Games at the ExCel Arena August 10, 2012 in London. Russo, who was floored twice, fought back to a 15-13 points decision to advance to the final. AFP PHOTO / Jack GUEZ

Spanish centre Marc Gasol (L) and Russian forward Andrei Kirilenko (R) wait for the ball during the London 2012 Olympic Games men's semifinal basketball game bewteen Russia and Spain at the North Greenwich Arena in London on August 10, 2012. AFP PHOTO /MARK RALSTON

Spanish forward Pau Gasol (R) is challenged by Russian centre Alexander "Sasha" Kaun during the London 2012 Olympic Games men's semifinal basketball game bewteen Russia and Spain at the North Greenwich Arena in London on August 10, 2012. AFP PHOTO /EMMANUEL DUNAND

Spanish and Russia players vie for the ball during the London 2012 Olympic Games men's semifinal basketball game bewteen Russia and Spain at the North Greenwich Arena in London on August 10, 2012. AFP PHOTO /MARK RALSTON

Spanish centre Serge Ibaka is seen in action during the London 2012 Olympic Games men's semifinal basketball game bewteen Russia and Spain at the North Greenwich Arena in London on August 10, 2012. AFP PHOTO /TIMOTHY A. CLARY

Lativia's Maris Strombergs celebrates taking gold after winning the BMX cycling men's final event at the London 2012 Olympic Games in the Olympic Park in east London on August 10, 2012. AFP PHOTO / LEON NEAL

Lativia's Maris Strombergs celebrates taking gold after winning the BMX cycling men's final event at the London 2012 Olympic Games in the Olympic Park in east London on August 10, 2012. AFP PHOTO / LEON NEAL

PICTURE TAKEN WITH AN UNDERWATER CAMERA Britain's Katie Skelton, Britain's Olivia Federici, Britain's Katie Clark, Britain's Jennifer Knobbs, Britain's Katie Dawkins, Britain's Asha Randall and Britain's Jenna Randall compete in the team free routine final during the synchronised swimming competition at the London 2012 Olympic Games on August 10, 2012 in London. AFP PHOTO / FRANCOIS XAVIER MARIT

Spanish guard Sergio Llull is pictured in action during the London 2012 Olympic Games men's semifinal basketball game bewteen Russia and Spain at the North Greenwich Arena in London on August 10, 2012. AFP PHOTO /TIMOTHY A. CLARY

Spanish centre Marc Gasol (R) vies for the ball with Russian guard Vitaliy Fridzon during the London 2012 Olympic Games men's semifinal basketball game bewteen Russia and Spain at the North Greenwich Arena in London on August 10, 2012. AFP PHOTO /MARK RALSTON

Cyclists take a jump during the BMX cycling men's final event at the London 2012 Olympic Games in the Olympic Park in east London on August 10, 2012. AFP PHOTO / LEON NEAL

CORRECTING RIDER ID Lativia's Maris Strombergs (R) rides ahead of Australia's Sam Willoughby (C) and Britain's Liam Phillips on the course during the BMX cycling men's final event at the London 2012 Olympic Games in the Olympic Park in east London on August 10, 2012. AFP PHOTO / LEON NEAL

Russian centre Timofey Mozgov (C) jumps for the ball during the London 2012 Olympic Games men's semifinal basketball game bewteen Russia and Spain at the North Greenwich Arena in London on August 10, 2012. AFP PHOTO /MARK RALSTON

A general view shows riders on the course during the BMX cycling event at the London 2012 Olympic Games in the Olympic Park in east London on August 10, 2012. AFP PHOTO / LEON NEAL

Riders take a jump during the BMX cycling women's final event at the London 2012 Olympic Games in the Olympic Park in east London on August 10, 2012. AFP PHOTO / LEON NEAL

Russian forward Andrei Kirilenko falls near photographers during the London 2012 Olympic Games men's semifinal basketball game bewteen Russia and Spain at the North Greenwich Arena in London on August 10, 2012. AFP PHOTO /EMMANUEL DUNAND

Puerto Rico's Francisco Daniel Soler Tanco (L) wrestles Canada's Matthew Judah Gentry in their Men's 74kg Freestyle repechage round 2 match on August 10, 2012 during the wrestling event of the London 2012 Olympic Games. AFP PHOTO / MARWAN NAAMANI

Russian sideliners react during the London 2012 Olympic Games men's semifinal basketball game bewteen Russia and Spain at the North Greenwich Arena in London on August 10, 2012. AFP PHOTO /EMMANUEL DUNAND

Bulgaria's Radoslav Marinov Velikov (R) wrestles India's Amit Kumar during their Men's 55kg Freestyle repechage round 2 match on August 10, 2012 during the wrestling event of the London 2012 Olympic Games. AFP PHOTO / YURI CORTEZ

Namibia's Naatele Sem Shilimela (R) is blocked by North Korea's Yang Kyong Il during their Men's 55kg Freestyle repechage round 2 match on August 10, 2012 during the wrestling event of the London 2012 Olympic Games. AFP PHOTO / YURI CORTEZ

Spanish players celebrate winning 67-59 against Russia during the London 2012 Olympic Games men's semifinal basketball game bewteen Russia and Spain at the North Greenwich Arena in London on August 10, 2012. AFP PHOTO /MARK RALSTON

Spanish players celebrate winning 67-59 against Russia during the London 2012 Olympic Games men's semifinal basketball game bewteen Russia and Spain at the North Greenwich Arena in London on August 10, 2012. AFP PHOTO /MARK RALSTON

Spanish players celebrate winning 67-59 against Russia during the London 2012 Olympic Games men's semifinal basketball game bewteen Russia and Spain at the North Greenwich Arena in London on August 10, 2012. AFP PHOTO /MARK RALSTON

Spanish players celebrate winning 67-59 against Russia during the London 2012 Olympic Games men's semifinal basketball game bewteen Russia and Spain at the North Greenwich Arena in London on August 10, 2012. AFP PHOTO /TIMOTHY A. CLARY

Dejected Russian players react after losing 67-59 to Spain during the London 2012 Olympic Games men's semifinal basketball game bewteen Russia and Spain at the North Greenwich Arena in London on August 10, 2012. AFP PHOTO /TIMOTHY A. CLARY

Russian centre Alexander "Sasha" Kaun dunks the ball during the London 2012 Olympic Games men's semifinal basketball game bewteen Russia and Spain at the North Greenwich Arena in London on August 10, 2012. AFP PHOTO /EMMANUEL DUNAND

Russia's Dzhamal Otarsultanov (R) wrestles Georgia's Vladimer Khinchegashvili during their Men's 55kg Freestyle gold medal match on August 10, 2012 during the wrestling event of the London 2012 Olympic Games. AFP PHOTO / YURI CORTEZ

Norway's Amund Nordal Gismervik competes in the men's 10m platform preliminary round during the diving event at the London 2012 Olympic Games on August 10, 2012 in London. AFP PHOTO / FABRICE COFFRINI

(FromL) Cuba's Yaneisi Borlot, Germany's Maral Feizbakhsh, Ukraine's Hanna Yaroshchuk, France's Marie Gayot and Belarus' Ilona Usovich wait to grab their batons during the women's 4 x 400m relay heats at the athletics event of the London 2012 Olympic Games on August 10, 012 in London. AFP PHOTO / GABRIEL BOUYS