Usain Bolt enters the 2012 Summer Games as the defending Olympic and world-record holder in all three events in which he'll participate. He may not be able to say the same as he leaves London.
He will most certainly retain those titles with the balance of the Jamaican 4x100-meter relay team. Shy of dropping the baton, the team will win the gold medal, likely in world-record time.
But Bolt will face some tight competition in his individual events. Most of it will come from his own teammates.
The following slides provide a daily overview of the 100-meter dash, the 200-meter and 4x100-meter relay. They provide start times for each event and predictions for his performance.