Rio Olympics: What to Watch on Day 9 - Usain Bolt Aims for a Historic Three-Peat
Day 9 of the Rio Olympics will be lit up by Usain Bolt, who's going for his third straight gold in the 100 meters.
The nine-plus-second battle for the title of Fastest Man on Earth will go down between two-time defending champion Usain Bolt and 2004 champ, American Justin Gatlin, who beat Bolt in 2014.