(By H. Darr Beiser, USA TODAY)
London (KSDK) -- Newschannel Five's Sports Director Rene Knott has been covering track and field all week long.
Rene joined Today in St. Louis live from London Wednesday morning, and he says it's a big day on the track for American athletes.
Three US women will be in the finals of the 200-meters.
Allison Felix, Carmelita Jeter and Sanya Richards-Ross all have a chance to medal.
On the men's side, Usain Bolt will run in preliminary heats of the men's 200-meters.
The Jamaican is the defending Olympic champion.
Watch the video in the player to see what Rene has to say about the day.