Watch live action from the IAAF track & field world championships, including the men’s 100-metre heats, featuring the final world championship appearance of Jamaican sprint legend Usain Bolt.
This story was originally published on CBC News. To read the rest of this news worthy story, please visit http://www.cbc.ca/sports/olympics/summer/trackandfield/world-track-and-field-live-stream-bolt-1.4231836?cmp=rss.