Angola's Marcelina Kiala jumps to shoot during the women's preliminary Group A handball match Brazil vs Angola for the London 2012 Olympics Games on August 5, 2012 at the Copper Box hall in London. AFP PHOTO/ MIGUEL MEDINA

Angolan forward Nacissela Mauricio (R) vies with Czech forward Jana Vesela during the women's preliminary round group A basketball match Angola vs Czech Republic of the London 2012 Olympic Games on August 5, 2012 at the basketball arena in London. AFP PHOTO / TIMOTHY A. CLARY

Lim Kyung-Hee (C) and Kim Seongeun of South Korea (C), Czech Republic's Ivana Sekyrova (2ndR) and Swiss Maja Neuenschwander run in front of Buckingham Palace during the women's marathon at the London 2012 Olympic Games, on August 5, 2012. AFP PHOTO POOL /Paul Hackett

US Venus Williams (L) and Serena Williams talk as they play against Czech Republic's Andrea Hlavackova and Lucie Hradecka during the women's doubles gold medal match of the London 2012 Olympic Games, at the All England Tennis Club in Wimbledon, southwest London, on August 5, 2012. AFP PHOTO / LEON NEAL

Karolina Michalczuk (L) of Poland defends against Chungneijang Mery Kom Hmangte (R) of India during the women's Flyweight boxing round of 16 of the 2012 London Olympic Games at the ExCel Arena August 5, 2012 in London. AFP PHOTO / Jack GUEZ

Karolina Michalczuk (L) of Poland defends against Chungneijang Mery Kom Hmangte (R) of India during the women's Flyweight boxing round of 16 of the 2012 London Olympic Games at the ExCel Arena August 5, 2012 in London. AFP PHOTO / Jack GUEZ

Karolina Michalczuk (L) of Poland defends against Chungneijang Mery Kom Hmangte (R) of India during the women's Flyweight boxing round of 16 of the 2012 London Olympic Games at the ExCel Arena August 5, 2012 in London. AFP PHOTO / Jack GUEZ

Karolina Michalczuk (L) of Poland defends against Chungneijang Mery Kom Hmangte (R) of India during the women's Flyweight boxing round of 16 of the 2012 London Olympic Games at the ExCel Arena August 5, 2012 in London. AFP PHOTO / Jack GUEZ

Karolina Michalczuk (R) of Poland defends against Chungneijang Mery Kom Hmangte (L) of India during the women's Flyweight boxing round of 16 of the 2012 London Olympic Games at the ExCel Arena August 5, 2012 in London. AFP PHOTO / Jack GUEZ

Spain's Andrea Fuentes Fache and Spain's Ona Carbonell Ballestro compete in the duets technical routine during the synchronised swimming competition at the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / MARTIN BUREAU

A stuffed kangoroo is pictured next to the London 2012 Olympic Games logo during the women's preliminary round group B basketball match Canada vs Australia on August 5, 2012 at the basketball arena in London. AFP PHOTO / TIMOTHY A. CLARY

Italy's Mariangela Perrupato and Italy's Giulia Lapi compete in the duets technical routine during the synchronised swimming competition at the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / MARTIN BUREAU

China's Lin Dan celebrates after beating Malaysia's Lee Chong Wei in the Men's Singles badminton medal match at the London 2012 Olympic Games in London, on August 5, 2012. AFP PHOTO / ADEK BERRY

Hungary's Krisztian Berki competes during the men's pommel horse final of the artistic gymnastics event of the London Olympic Games on August 5, 2012 at the 02 North Greenwich Arena in London. Berki won the gold medal. AFP PHOTO / BEN STANSALL

Italy's Alberto Busnari competes during the men's pommel horse final of the artistic gymnastics event of the London Olympic Games on August 5, 2012 at the 02 North Greenwich Arena in London. Busnari finished 4th. AFP PHOTO / BEN STANSALL

Britain's Ben Ainslie celebrates winning the gold medal in the Finn sailing class at the London 2012 Olympic Games, in Weymouth on August 5, 2012. AFP PHOTO/William WEST

Britain's Andy Murray (L) embraces Kim Sears after beating Switzerland's Roger Federer in their London 2012 Olympic Games men's doubles gold medal match at Wimbledon in south London on August 5, 2012. AFP PHOTO / CARL COURT.

Great Britain's Andy Murray celebrates after winning the men's singles gold medal match of the London 2012 Olympic Games by defeating Switzerland's Roger Federer, at the All England Tennis Club in Wimbledon, southwest London, on August 5, 2012. AFP PHOTO / LEON NEAL

Great Britain's Andy Murray celebrates after winning the men's singles gold medal match of the London 2012 Olympic Games by defeating Switzerland's Roger Federer, at the All England Tennis Club in Wimbledon, southwest London, on August 5, 2012. AFP PHOTO / LEON NEAL

Germany's Robert Forstemann (R) shakes hands with France's Gregory Bauge after the latter crosses the finish line first during the London 2012 Olympic Games men's sprint quarterfinals cycling event at the Velodrome in the Olympic Park in East London on August 5, 2012. AFP PHOTO /ODD ANDERSEN

US athlete Sarah Robles competes during the women's 75+kg group A weightlifting event of the London 2012 Olympic Games at The Excel Centre in London on August 5, 2012. AFP PHOTO / YURI CORTEZ

Portugal's Joao Monteiro (L) and Tiago Apolonia compete against South Korea's pair Oh Sangeun and Seungmin Ryu in a table tennis men's team quarter-final match of the London 2012 Olympic Games at the Excel centre in London on August 5, 2012. AFP PHOTO / Saeed Khan

Russia's Ekaterina Gamova (L) and Maria Perepelkina attempt to block during the Women's preliminary pool A volleyball match between Italy and Russia in the 2012 London Olympic Games in London on August 5, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Russia's Evgeniya Startseva (L) and Evgenia Estes attempt to set during the Women's preliminary pool A volleyball match between Italy and Russia in the 2012 London Olympic Games in London on August 5, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Goild medallist China's Zhou Lulu salutes during the women's 75+kg group A weightlifting event of the London 2012 Olympic Games at The Excel Centre in London on August 5, 2012. AFP PHOTO / YURI CORTEZ

Switzerland's Pius Schwizer on Carlina V competes in the second Individual Show Jumping qualifier of the 2012 London Olympics at the Equestrian venue in Greenwich Park, London on August 5, 2012. AFP PHOTO / JOHN MACDOUGALL

US guard Seimone Augustus (L) vies with Chinese guard Song Xiaoyun during the women's preliminary round group A basketball match China vs USA of the London 2012 Olympic Games on August 5, 2012 at the basketball arena in London. USA won 114 to 66. AFP PHOTO / TIMOTHY A. CLARY

Germany's Benjamin Kleibrink (L) fences against US fencer Alexander Massialas during the men's foil team medal bronze match as part of the fencing event of London 2012 Olympic games, on August 5, 2012 at the ExCel centre in London. AFP PHOTO / TOSHIFUMI KITAMURA

Denmark's Lasse Norman Hansen celebrates after winning the gold medal in the London 2012 Olympic Games men's omnium 1km time trial cycling event at the Velodrome in the Olympic Park in East London on August 5, 2012. AFP PHOTO /ODD ANDERSEN

Jamaica's Usain Bolt reacts after competing in the men's 100m semi-finals at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt, Saint Kitts & Nevis' Antoine Adams (R) and Britain's Dwain Chambers (L) compete in the men's 100m semi-finals at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / JEWEL SAMAD

Jamaica's Usain Bolt reacts after competing in the men's 100m semi-finals at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt reacts after competing in the men's 100m semi-finals at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Yohan Blake competes in the men's 100m semi-finals at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / ERIC FEFERBERG

Jamaica's Yohan Blake competes in the men's 100m semi-finals at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / ERIC FEFERBERG

Jamaica's Usain Bolt gestures prior to competing in the men's 100m semi-finals at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / FRANCK FIFE

A cheerleader performs during the women's Beach Volleyball quarterfinal between Kerri Walsh and Misty May-Treanor from the US against Italy's Marta Menegatti and Greta Cicolari on the Centre Court Stadium in Horse Guards Parade on London on August 05, 2012, for the London 2012 Olympic Games. USA won 2-0 AFP PHOTO / DANIEL GARCIA

Britain's Alexander Smith competes in the men's hammer throw final during the London 2012 Olympic Games at the Olympic Stadium, on August 5, 2012. AFP PHOTO / POOL / FABRIZIO BENSCH

Belgium's Kevin Borlee is pictured during the men's 400m semi-finals at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / JEWEL SAMAD

US' Sanya Richards-Ross celebrates after winning the women's 400m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Britain's Yamile Aldama competes in the women's triple jump final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / ADRIAN DENNIS

Colombia's Caterine Ibarguen competes in the women's triple jump final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / ADRIAN DENNIS

US' Deedee Trotter is seen after the women's 400m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / JEWEL SAMAD

Jamaica's Usain Bolt (2L) wins the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt (2L) wins the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt (R) wins the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt (R) wins the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Athletes compete in the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO/JEWEL SAMAD

Jamaica's gold medalist Usain Bolt (L), Jamaica's silver Yohan Blake (R) and US' bronze medalist Justin Gatlin (L) compete in the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO/JEWEL SAMAD

PICTURE SHOT WITH ROBOTIC CAMERA Jamaica's Usain Bolt (R) wins the Men's 100m Final at the Athletics Stadium in the Olympic Park in London, on August 5, 2012, during the London 2012 Olympic Games. AFP PHOTO / ANTONIN THUILLIER

PICTURE SHOT WITH ROBOTIC CAMERA Jamaica's Usain Bolt (R) wins the Men's 100m Final at the Athletics Stadium in the Olympic Park in London, on August 5, 2012, during the London 2012 Olympic Games. AFP PHOTO / ANTONIN THUILLIER

Jamaica's Usain Bolt (L) crosses the line to win the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / DAMIEN MEYER

Jamaica's Usain Bolt (C) crosses the finish line to win the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Jamaica's Usain Bolt celebrates after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Jamaica's Usain Bolt (R) crosses the finish line to win the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / EMMANUEL DUNAND

Jamaica's Usain Bolt reacts after he won the men's 100m final at the athletics event of the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / JOHANNES EISELE

Jamaica's Usain Bolt reacts after he won the men's 100m final at the athletics event of the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / JOHANNES EISELE

Jamaica's Usain Bolt celebrates after winning the gold medal in the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO/ERIC FEFERBERG

Jamaica's Usain Bolt celebrates after winning the gold medal in the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO/ERIC FEFERBERG

PICTURE SHOT WITH ROBOTIC CAMERA Jamaica's Usain Bolt (3rd L) wins the Men's 100m Final at the Athletics Stadium in the Olympic Park in London, on August 5, 2012, during the London 2012 Olympic Games. AFP PHOTO / ANTONIN THUILLIER

Jamaica's Usain Bolt (front) crosses the line in front of compatriot second placed Yohan Blake (2nd R) and third placed Justin Gatlin (L-Red) of the US to win the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / DAMIEN MEYER

Jamaica's Usain Bolt reacts after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / DAMIEN MEYER

Jamaica's Usain Bolt celebrates after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / GABRIEL BOUYS

(From L) US' Ryan Bailey, Jamaica's Usain Bolt, US' Justin Gatlin, Jamaica's Yohan Blake and US' Tyson Gay compete in the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Jamaica's Usain Bolt (R) runs to win the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / EMMANUEL DUNAND

Jamaica's Usain Bolt reacts as he crosses the finish line to win the men's 100m final at the athletics event of the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / JOHANNES EISELE

This handout photo finish released by Omega, the official timekeeper of the London 2012 Olympic games, shows Jamaica's Usain Bolt (R), Jamaica's Yohan Blake (2nd R) and US' Justin Gatlin (3rd R) crossing the finish line of the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / OMEGA" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS

Jamaica's Usain Bolt (L) celebrates after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt celebrates after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt crosses the finish line to win the gold medal in the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO/ERIC FEFERBERG

Jamaica's Usain Bolt celebrates after winning the gold medal in the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO/ERIC FEFERBERG

Jamaica's Usain Bolt (front) crosses the line in front of compatriot second placed Yohan Blake (upper R) and third placed Justin Gatlin (L-Red) of the US to win the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / DAMIEN MEYER

Jamaica's Usain Bolt celebrates after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt celebrates after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt celebrates after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt celebrates after winning the gold medal in the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO/JEWEL SAMAD

Jamaica's Usain Bolt celebrates after winning the gold medal in the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO/JEWEL SAMAD

PICTURE SHOT WITH ROBOTIC CAMERA Jamaica's Usain Bolt (3rd L) wins the Men's 100m Final ahead of compatriot Yohan Blake (2nd R) and US' Justin Gatlin (3rd R) at the Athletics Stadium in the Olympic Park in London, on August 5, 2012, during the London 2012 Olympic Games. AFP PHOTO / ANTONIN THUILLIER

PICTURE SHOT WITH ROBOTIC CAMERA Jamaica's Usain Bolt (R) wins the Men's 100m Final ahead of compatriot Yohan Blake (3rd L) and US' Justin Gatlin (4th L) at the Athletics Stadium in the Olympic Park in London, on August 5, 2012, during the London 2012 Olympic Games. AFP PHOTO / ANTONIN THUILLIER

Jamaica's Usain Bolt celebrates with his national flag after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / DAMIEN MEYER

Jamaica's Usain Bolt (3rdL) crosses the finish line after competing with (from L) Churandy Martina of the Netherlands, US' Ryan Bailey, US' Justin Gatlin, Jamaica's Yohan Blake, US' Tyson Gay, Jamaica's Asafa Powell and Trinidad and Tobago's Richard Thompson to win the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Jamaica's Usain Bolt reacts after he won gold in the men's 100m final at the athletics event of the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / JOHANNES EISELE

Jamaica's Usain Bolt celebrates after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt (R) celebrates with Jamaica's Yohan Blake (L) after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt looks skywards as he celebrates after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / DAMIEN MEYER

(Jamaica's Usain Bolt (R) and US' Ryan Bailey compete in the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / GABRIEL BOUYS

(From L) Jamaica's Usain Bolt, US' Justin Gatlin and Jamaica's Yohan Blake compete in the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Jamaica's Usain Bolt poses with the Olympics' mascott Wenlock as he celebrates winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / FRANCK FIFE

Jamaica's Usain Bolt (L) celebrates with Jamaica's Yohan Blake after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt celebrates after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt (R) celebrates with US' Justin Gatlin after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt holds Olympic mascot Wenlock as he celebrates after winning the gold medal in the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO/JEWEL SAMAD

US' Justin Gatlin celebrates after winning the bronze medal in the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. Jamaica's Usain Bolt won the gold medal and the bronze went to Jamaica's Yohan Blake. AFP PHOTO/JEWEL SAMAD

Jamaica's Usain Bolt holds the Olympics' mascott Wenlock as he celebrates winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / FRANCK FIFE

Jamaica's Usain Bolt celebrates after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / CHRISTOPHE SIMON

Jamaica's Usain Bolt looks up prior to compete in the men's 100m final at the athletics event of the London 2012 Olympic Games on August 5, 2012 in London. Bolt won gold. AFP PHOTO / FABRICE COFFRINI

Jamaica's Yohan Blake celebrates after the men's 100m final at the athletics event dur ing the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt celebrates after winning the gold medal in the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO/ERIC FEFERBERG

Jamaica's Usain Bolt celebrates after winning the gold medal in the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO/ERIC FEFERBERG

PICTURE SHOT WITH ROBOTIC CAMERA Jamaica's Asafa Powell gestures after crossing the finish line of the Men's 100m Final at the Athletics Stadium in the Olympic Park in London, on August 5, 2012, during the London 2012 Olympic Games. AFP PHOTO / ANTONIN THUILLIER

(From L) Churandy Martina of The Netherlands , US' Ryan Bailey, Jamaica's Usain Bolt, US' Justin Gatlin, Jamaica's Yohan Blake, US' Tyson Gay, Jamaica's Asafa Powell and Trinidad and Tobago's Richard Thompson compete in the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Jamaica's Usain Bolt (3rdL) crosses the finish line after competing with (from L) Churandy Martina of the Netherlands, US' Ryan Bailey, US' Justin Gatlin, Jamaica's Yohan Blake, US' Tyson Gay, Jamaica's Asafa Powell and Trinidad and Tobago's Richard Thompson to win the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Jamaica's Usain Bolt (C) looks up prior to taking the start of the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / FRANCK FIFE

Jamaica's Usain Bolt celebrates next to second-placed Jamaica's Yohan Blake after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Gold medalist Jamaica's Usain Bolt (L) and Jamaica's Yohan Blake celebrate after the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / EMMANUEL DUNAND

(L-R) The Netherlands' Churandy Martina, US' Ryan Bailey, Jamaica's Usain Bolt, US' Justin Gatlin, Jamaica's Yohan Blake, US' Tyson Gay, Jamaica's Asafa Powell, Trinidad and Tobago's Richard Thompson compete in the men's 100m final next to US' Justin Gatlin (C), Jamaica's Yohan Blake (R) at the athletics event of the London 2012 Olympic Games on August 5, 2012 in London. Bolt won gold. AFP PHOTO / FABRICE COFFRINI

US' Justin Gatlin reacts after the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Asafa Powell reacts after the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt celebrates after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt (R) and Jamaica's Yohan Blake (L) celebrate after the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / ADRIAN DENNIS

Jamaica's Usain Bolt (L) and Justin Gatlin of the US sprint towards the finish line in the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. Bolt won the gold medal and Gatlin the bronze. AFP PHOTO / MARK RALSTON

Jamaica's Usain Bolt celebrates after the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. Bolt won the gold medal. AFP PHOTO / MARK RALSTON

Jamaica's Usain Bolt celebrates after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / CHRISTOPHE SIMON

Jamaica's Usain Bolt reacts after he won the men's 100m final at the athletics event of the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / JOHANNES EISELE

(Front to back) The Netherlands' Churandy Martina, US' Ryan Bailey, Jamaica's Usain Bolt, US' Justin Gatlin, Jamaica's Yohan Blake, US' Tyson Gay, Jamaica's Asafa Powell, Trinidad and Tobago's Richard Thompson compete in the men's 100m final at the athletics event of the London 2012 Olympic Games on August 5, 2012 in London. Bolt won gold. AFP PHOTO / MIGUEL MEDINA

(Front to back) Jamaica's Usain Bolt, US' Justin Gatlin, Jamaica's Yohan Blake compete in the men's 100m final at the athletics event of the London 2012 Olympic Games on August 5, 2012 in London. Bolt won gold. AFP PHOTO / MIGUEL MEDINA

Jamaica's Usain Bolt (R) celebrates with US' Justin Gatlin after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt gives a thumbs-up as he celebrates winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / FRANCK FIFE

Jamaica's Usain Bolt gestures prior to taking the start of the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / FRANCK FIFE

Jamaica's Usain Bolt dances prior to taking the start of the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / FRANCK FIFE

Jamaica's Usain Bolt (R) walks past silver medalist Jamaica's Yohan Blake (C) and bronze medalist US' Justin Gatlin after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / FRANCK FIFE

Jamaica's Usain Bolt celebrates after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / FRANCK FIFE

Jamaica's Usain Bolt (R) celebrates with Jamaica's Yohan Blake (L) after winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / ADRIAN DENNIS

Jamaica's Usain Bolt sprints towards the finish line in the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. Bolt won the gold medal, Blake the silver and Gatlin the bronze. AFP PHOTO / MARK RALSTON

Kenya's Ezekiel Kemboi celebrates after winning the men's 3000m steeplechase final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Kenya's Ezekiel Kemboi celebrates as he crosses the finish line to win the men's 3000m steeplechase final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Jamaica's Usain Bolt (L) wins the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt celebrates winning the men's 100m final at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / ADRIAN DENNIS