Can lightning strike twice?
Usain Bolt will answer that question when he takes to the track to defend his gold medals in the 100- and 200-meter dashes from the 2008 Olympic Games in Beijing. The Jamaican sprinter broke the world record in both events in Beijing.
The 2012 Olympic Games in London will pose new challenges and challengers for Bolt. No longer is he the new, up-and-coming star in track and field trying to keep up with the likes of Tyson Gay and Asafa Powell. Now, he is the superstar that every other sprinter wants to beat.
Jamaican track team doctor Winston Dawes says Bolt is 100 percent healthy and will be in perfect shape to defend his titles.
He will have to be, with these five men wanting to unseat him in London.