Usain Bolt brings light to a sport in peril (Yahoo Sports)

Since he coasted to the 100-meter finish line in world-record time at the Bird’s Nest eight years ago, Usain Bolt has been the smiling face of track and field. Whether viewed over the six days he runs in Rio, or over the eight years he’s graced the world with his once-in-a-lifetime mix of speed, smiles and showmanship, the World’s Fastest Man has offered track a reprieve from the wasteland of corrupt countries, reshuffled medals and win-at-any-cost malfeasance it has become.