Usain Bolt failed to make it to the finishing line in his last race.
The Jamaican great crumpled to the track because of a left leg injury as he was chasing gold in the 400-meter relay at the world championships.
Instead, Britain upset the United States to take gold in 37.47 seconds. The Americans…
from latimes.com – Los Angeles Times http://www.latimes.com/la-sp-world-track-championships-20170812-story.html