Photos: USA Olympic Swimming Trials

Becca Mann, Katie Ledecky and Cierra Runge of the United States competes in a heat for the Women’s 400 Meter Freestyle during Day Two.

(Tom Pennington / Getty Images)

June 29, 2016 3:47 PM PT

Missy Franklin competes in a preliminary heat for the Women’s 100 Meter Backstroke during Day Two.

(Tom Pennington / Getty Images)

Kevin Cordes competes in a preliminary heat of the Men’s 200 Meter Breaststroke during Day 4.

(Eric Francis / Getty Images)

David Plummer swims in the men’s 100-meter backstroke final.

(Mark J. Terrill / Associated Press)

Michael Phelps climbs out of the pool after his heat in the men’s 200-meter butterfly preliminaries.

(Mark J. Terrill / Associated Press)

Olivia Smoliga celebrates after winning the women’s 100-meter backstroke.

(Mark J. Terrill / Associated Press)

Holly Harper competes in a preliminary heat for the Women’s 100 Meter Backstroke during Day 2.

(Tom Pennington / Getty Images)

Katie Ledecky of the United States competes in a heat for the Women’s 400 Meter Freestyle during Day Two.

(Tom Pennington / Getty Images)

Lilly King, right, an Katie Meili, left, look at the results after King won the women’s 100-meter breaststroke final.

(Orlin Wagner / Associated Press)

Kelsi Worrell reacts after her heat in the women’s 200-meter butterfly preliminaries at the U.S. Olympic swimming trials, Wednesday, June 29, 2016, in Omaha, Neb. (AP Photo/Mark J. Terrill) (Mark J. Terrill / Associated Press)

Amy Bilquist reacts after winning her heat in the women’s 100-meter backstroke preliminaries.

(Mark J. Terrill / Associated Press)