Katie Ledecky reacts after winning the Women's 400 freestyle finals heat Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Michael Conroy)
Katie Ledecky swims during the Women's 400 freestyle preliminaries Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Michael Conroy)
Gretchen Walsh waves before the Women's 100 butterfly semifinals heat Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Darron Cummings)
Aaron Shackell reacts after winning the Men's 400 freestyle finals heat Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Darron Cummings)
Katie Ledecky reacts after winning the Women's 400 freestyle finals heat Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Michael Conroy)
Katie Ledecky reacts after winning the Women's 400 freestyle finals heat Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Michael Conroy)
Katie Ledecky swims during the Women's 400 freestyle preliminaries Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Michael Conroy)
Katie Ledecky is introduced before the Women's 400 freestyle finals heat Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Darron Cummings)
Katie Ledecky reacts after winning the Women's 400 freestyle finals Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Darron Cummings)
Katie Ledecky reacts after winning the Women's 400 freestyle finals Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Darron Cummings)
Katie Ledecky reacts after winning the Women's 400 freestyle finals Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Michael Conroy)
Katie Ledecky starts the Women's 400 freestyle finals heat Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Darron Cummings)
Katie Ledecky is congratulated by Paige Madden after winning the Women's 400 freestyle finals heat Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Michael Conroy)
Gretchen Walsh reacts to her world record in her Women's 100 butterfly semifinals heat Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Michael Conroy)
Aaron Shackell swims during the Men's 400 freestyle finals heat Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Michael Conroy)
Katie Ledecky swims during the Women's 400 freestyle preliminaries Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Darron Cummings)
Katie Ledecky after the Women's 400 freestyle preliminaries Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Darron Cummings)
Katie Ledecky swims during the Women's 400 freestyle finals Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Darron Cummings)
Gretchen Walsh swims during the Women's 100 butterfly semifinals heat Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Michael Conroy)
Katie Ledecky swims during the Women's 400 freestyle preliminaries Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Michael Conroy)
Gretchen Walsh reacts to her world record in her Women's 100 butterfly semifinals heat Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Darron Cummings)
Katie Ledecky swims during the Women's 400 freestyle preliminaries Saturday, June 15, 2024, at the US Swimming Olympic Trials in Indianapolis. (AP Photo/Michael Conroy)