** FILE ** Swimmers Katie Ledecky, Allison Schmitt and Chloe Sutton compete in the 400 freestyle final at the U.S. swimming trials in Omaha, Neb. (Associated Press)

** FILE ** Swimmers Katie Ledecky, Allison Schmitt and Chloe Sutton compete in the 400 freestyle final at the U.S. swimming trials in Omaha, Neb. (Associated Press)