Track and Field Day 5: Athing Mu, Gabby Thomas Aim for Gold

Four gold medals are up for grabs on Day 5 of track and field action at the Tokyo Olympics and there are plenty of Americans who could end up a winner. Athing Mu returns to the track and a gold medal favorite in the women's 800m, while Gabby Thomas will try to dethrone two of the fastest women in the world, Jamaica's Elaine Thompson-Herah and Shelly-Ann Fraser-Pryce in the Women's 200m.