A member of the street theatre company 'Osadia', from Barcelona in Spain, poses for pictures in London, on August 9, 2012, showcasing 'hair art' which incorporates a British theme during the London 2012 Olympic Games. AFP PHOTO / ANDREW COWIE

A picture shows the braids of French centre Isabelle Yacoubou in the colours of her national flag during the London 2012 Olympic Games women's semifinal basketball game bewteen Russia and France at the North Greenwich Arena in London on August 9, 2012. AFP PHOTO /TIMOTHY A. CLARY

China's Zhang Xi jumps for the ball during the women's beach volleyball semi-final match USA v China on The Centre Court at Horse Guards Parade in London on August 7, 2012. USA won 2-1. AFP PHOTO / CHRISTOPHE SIMON

South Africa's Oscar Pistorius (L) and athletes compete in the men's 4X400m relay heats at the athletics event during the London 2012 Olympic Games on August 9, 2012 in London. AFP PHOTO / OLIVIER MORIN

Belarus' Liubou Charkashyna performs her hoop program during the individual all-around qualifications of the rythmic gymnastics event of the London Olympic Games on August 9, 2012 at Wembley arena in London. AFP PHOTO / BEN STANSALL

Germany's Jana Berezko-Marggrander performs her ball program during the individual all-around qualifications of the rythmic gymnastics event of the London Olympic Games on August 9, 2012 at Wembley arena in London. AFP PHOTO / BEN STANSALL

China's Luo Xi, China's Sun Wenyan, China's Wu Yiwen, China's Liu Oi, China's Jiang Wenwen, China's Chang Si, China's Huang Xuechen and China's Jiang Tingting compete in the team technical routine during the synchronised swimming competition at the London 2012 Olympic Games on August 9, 2012 in London. AFP PHOTO / FRANCOIS XAVIER MARIT (PICTURE TAKEN WITH AN UNDERWATER CAMERA)

(L-R) Australia's Sam Willoughby, the Netherland's Twan van Gendt, Australia's Brian Kirkham, South Africa's Sifiso Nhlapo, Colombia's Carlos Mario Oquendo Zabala and Belgium's Arnaud Dubois compete during the men's BMX quarter finals at the BMX venue in the Olympic Park, during the London 2012 Olympic games in London on August 9, 2012. AFP PHOTO/Carl de Souza

Jamaica's Usain Bolt competes in the men's 200m final in victory at the athletics event during the London 2012 Olympic Games on August 9, 2012 in London. Bolt retained his 200m title on Thursday to become the first man to achieve the sprint double at consecutive Olympics. AFP PHOTO / FRANCISCO LEONG

The US team pose for a photograph after beating Spain during the women's water polo final match at the London 2012 Olympic Games in London on August 9, 2012. AFP PHOTO / ADEK BERRY