![Charlie Neibergall Athing Mu wins a heat in the women's 800-meter semi-final as Kate Grace and Michaela Rose collide during the U.S. Track and Field Olympic Team Trials Sunday, June 23, 2024, in Eugene, Ore. (AP Photo/Charlie Neibergall)](https://mapi.associatedpress.com/v2/items/28db3d02977747f9a944cfa7380288e5/preview/preview.jpg?s=680x&wm=false)
Athing Mu wins a heat in the women's 800-meter semi-final as Kate Grace and Michaela Rose collide during the U.S. Track and Field Olympic Team Trials Sunday, June 23, 2024, in Eugene, Ore. (AP Photo/Charlie Neibergall)
![Charlie Neibergall Athing Mu wins a heat in the women's 800-meter semi-final as Kate Grace and Michaela Rose collide during the U.S. Track and Field Olympic Team Trials Sunday, June 23, 2024, in Eugene, Ore. (AP Photo/Charlie Neibergall)](https://mapi.associatedpress.com/v2/items/ec774c32b2214c4e9dd51a1896a890b4/preview/preview.jpg?s=680x&wm=false)
Athing Mu wins a heat in the women's 800-meter semi-final as Kate Grace and Michaela Rose collide during the U.S. Track and Field Olympic Team Trials Sunday, June 23, 2024, in Eugene, Ore. (AP Photo/Charlie Neibergall)
![Charlie Neibergall Athing Mu wins a heat in the women's 800-meter semi-final as Kate Grace and Michaela Rose collide during the U.S. Track and Field Olympic Team Trials Sunday, June 23, 2024, in Eugene, Ore. (AP Photo/Charlie Neibergall)](https://mapi.associatedpress.com/v2/items/1cf945bee8ef4af3ab91967dbfbbe477/preview/preview.jpg?s=680x&wm=false)
Athing Mu wins a heat in the women's 800-meter semi-final as Kate Grace and Michaela Rose collide during the U.S. Track and Field Olympic Team Trials Sunday, June 23, 2024, in Eugene, Ore. (AP Photo/Charlie Neibergall)
![Charlie Neibergall Kate Grace falls after colliding with Michaela Rose in a heat in the women's 800-meter semi-final during the U.S. Track and Field Olympic Team Trials Sunday, June 23, 2024, in Eugene, Ore. (AP Photo/Charlie Neibergall)](https://mapi.associatedpress.com/v2/items/b6b7915b1cd44956bc6c33b81778c407/preview/preview.jpg?s=680x&wm=false)
Kate Grace falls after colliding with Michaela Rose in a heat in the women's 800-meter semi-final during the U.S. Track and Field Olympic Team Trials Sunday, June 23, 2024, in Eugene, Ore. (AP Photo/Charlie Neibergall)