Australia's Steven Hooker competes in the men's pole vault final at the athletics event of the London 2012 Olympic Games on August 10, 2012 in London. AFP PHOTO / JOHANNES EISELE

France's Renaud Lavillenie competes in the men's pole vault final at the athletics event of the London 2012 Olympic Games on August 10, 2012 in London. AFP PHOTO / JOHANNES EISELE

US' Diamond Dixon competes in the women's 4 x 400m relay heats at the athletics event of the London 2012 Olympic Games on August 10, 2012 in London. AFP PHOTO / JEWEL SAMAD

Australia's Mathew Belcher and Malcolm Page sail to the gold medal 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

Russia's Natalya Nazarova (R) hands the baton to Russia's Anastasiya Kapachinskaya during the women's 4 x 400m relay heats at the athletics event of the London 2012 Olympic Games on August 10, 2012 in London. AFP PHOTO / OLIVIER MORIN

Bulgaria's Radoslav Marinov Velikov wrestles Japan's Shinichi Yumoto during their Men's 55kg Freestyle bronze medal match on August 10, 2012 during the wrestling event of the London 2012 Olympic Games. AFP PHOTO / MARWAN NAAMANI

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

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

TOPSHOTS China's Deng Senyue 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

Britain's Adam Gemili reacts after they were disqualified in their men's 4x100m relay round 1 heat at the London 2012 Olympic Games at the Olympic Stadium August 10, 2012. REUTERS/Eddie Keogh

Ethiopia's gold medalist Meseret Defar celebrates after winning the women's 5000m final at the athletics event of the London 2012 Olympic Games on August 10, 2012 in London. AFP PHOTO / OLIVIER MORIN

Russia's Evgeniy Lukyanenko competes in the men's pole vault final at the athletics event of the London 2012 Olympic Games on August 10, 2012 in London. AFP PHOTO / FRANCK FIFE

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

Colombia's Carlos Mario Oquendo Zabala (R) rides ahead of Australia's Sam Willoughby (2R) 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

A member of the Australia's 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 / FABRICE COFFRINI

Great Britain's Liam Heath (front) and Jon Schofield 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

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

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. He won gold. AFP PHOTO / LUIS ACOSTA

TOPSHOTS 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

Carmelita Jeter of the U.S. celebrates after the U.S. won the women's 4x100m relay final during the London 2012 Olympic Games at the Olympic Stadium August 10, 2012. The United States won the women's 4x100 metres relay in a world record time at the London Olympics on Friday, completing the lap in a sizzling 40.82 seconds to win the title back for the first time since 1996. REUTERS/David Gray

Jeffery Demps of the U.S. prepares to start in the men's 4x100m relay round 1 heat during the London 2012 Olympic Games at the Olympic Stadium August 10, 2012. REUTERS/Lucy Nicholson

North Korea's Kyong Il Yang (in red) fights gor the bronze medal with Kazakhstan's Daulet Niyazbekov on the Men's 55Kg Freestyle wrestling at the ExCel venue during the London 2012 Olympic Games August 10, 2012. REUTERS/Suhaib Salem

Spain's team perform in the synchronised swimming teams free routine final during the London 2012 Olympic Games at the Aquatics Centre August 10, 2012. REUTERS/Marcelo Del Pozo

Bulgaria's Silviya Miteva competes using the ribbon in her individual all-around gymnastics qualification match at the Wembley Arena during the London 2012 Olympic Games August 10, 2012. REUTERS/Jorge Silva

Cyclists compete in the men's BMX final during the London 2012 Olympic Games at the BMX Track in the Olympic Park August 10, 2012. REUTERS/Paul Hanna

Britain's Francesca Jones competes using the ribbon in her individual all-around gymnastics qualification match at the Wembley Arena during the London 2012 Olympic Games August 10, 2012. REUTERS/Jorge Silva

Russia's team wait for their score after performing in the synchronised swimming teams free routine final during the London 2012 Olympic Games at the Aquatics Centre August 10, 2012. Russia won gold in the event. REUTERS/Toby Melville

China's team perform in the synchronised swimming teams free routine final during the London 2012 Olympic Games at the Aquatics Centre August 10, 2012. REUTERS/Toby Melville

Kazakhstan's Daulet Niyazbekov (in red) fights with Russia's Dzhamal Otarsultanov on the Men's 55Kg Freestyle wrestling at the ExCel venue during the London 2012 Olympic Games August 10, 2012. REUTERS/Suhaib Salem