RIO DE JANIERIO -- There will be more than 11,000 athletes from over 200 countries and territories competing in the Olympics that begin Friday. That means endless great stories and Olympians to follow, but here are our 10 top athletes and events to watch.
Usain Bolt
The fastest man in the world has won gold in the 100, 200 and 4x100 relay in the past two Olympics, but Bolt hurt his hamstring at the Jamaican Olympic trials. Does that mean he won't be performing his signature lightning bolt salute in Rio?