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
(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 take 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 / FRANCISCO LEONG
Britain's Prince William (L), Catherine, Duchess of Cambridge (C) and Prince Harry (R) look on during the men's 100 metre final at the London 2012 Olympic Games in London on August 5, 2012. Jamaica's Usain Bolt sealed his status as the greatest sprinter of all time after retaining the men's Olympic 100m title with an electrifying display. The world record holder turned on the after-burners at 60m to clock an Olympic record of 9.63sec, the second fastest time in history.AFP PHOTO / CARL COURT