Belarus' Nastassia Mironchyk-Ivanova competes in the women's long jump final at the 2012 Summer Olympics,August 8, in London (AP Photo/Matt Dunham, File).

Belarus' Liubou Charkashyna performs her hoop program during the individual all-around final of the rythmic gymnastics event of the London Olympic Games on August 11, 2012 at Wembley arena in London. (AFP Photo / Thomas Coex)

Russia's Sergey Kirdyapkin (R) leads the pack as they walk past Buckingham Palace during the men's 50km race walk at the London 2012 Olympic Games in London on August 11, 2012 (AFP Photo / Martin Bureau)

Russia's Evgeniya Kanaeva performs her clubs program during the individual all-around final of the rythmic gymnastics event of the London Olympic Games on August 11, 2012 at Wembley arena in London. Russia's Evgeniya Kanaeva won gold (AFP Photo / Antonin Thuillier) Picture taken with a robotic camera.

South Korea's Hwang Woojin loses control of his horse Shearwater Oscar during the Show Jumping event of the Modern Pentathlon during the 2012 London Olympics (AFP Photo / John Macdougall).

Brazil's Fernanda Rodrigues serves during the women's volleyball gold medal match of the London 2012 Olympics Games against the US, in London on August 11, 2012. (AFP Photo / Franscisco Leong)

Britain's Mohamed Farah celebrates after winning the men's 5000m final at the athletics event of the London 2012 Olympic Games on August 11, 2012 in London. (AFP Photo / Olivier Morin)

A Norway's handball fan holds a baby wearing ear protectors during the women's gold medal handball match Norway vs Montenegro for the London 2012 Olympics Games on August 11, 2012. (AFP Photo / Javier Soriano)

US' Sanya Richards-Ross grabs the baton from US' Francena Mccorory (R) in the women's 4X400 relay final at the athletics event of the London 2012 Olympic Games (AFP Photo / Jewel Samad).

Gold medalist, Norway's goalkeeper Katrine Lunde Haraldsen celebrates on the podium after the women's gold medal handball match Norway vs Montenegro for the London 2012 Olympics Games. Norway's won 26-23. ( AFP Photo / Javier Soriano)

People watch Jamacain sprinter Usain Bolt on a giant screen in the Jamaican capital Kingston win the 100m final at the 2012 Olympics in London (AFP Photo/ STR).

Jamaica's Usain Bolt reacts after receiving a gold medal for the men's 4x100-meter during the athletics in the Olympic Stadium at the 2012 Summer Olympics(AP Photo/Matt Slocum).

South Africa's Willem Coertzen competes in the long jump decathlon at the 2012 Summer Olympics, August 8, 2012 (AP Photo/David J. Phillip).

Jaime Azcarraga, of Mexico, rides his horse Gangster in the equestrian show jumping team competition at the 2012 Summer Olympics, August 5 (AP Photo/David Goldman, File).