Usain Bolt (L) of Jamaica reacts after winning the men's 100m race at the IAAF Diamond League athletics meet at Bislett Stadium in Oslo, on June 7. Newly-designed starting blocks to be used at the ... more 

Usain Bolt (L) of Jamaica reacts after winning the men's 100m race at the IAAF Diamond League athletics meet at Bislett Stadium in Oslo, on June 7. Newly-designed starting blocks to be used at the London Olympics will "enhance" the performance of athletes, according to the sport's world governing body, the IAAF, and not slow them down as claimed by Bolt less