OMAHA, Neb. — America’s biggest swimming stars shined brightly on the next-to-last night of the Olympic trials.

Their only complaint? Both wanted to go a bit faster Saturday.

Caeleb Dressel added another event to his Tokyo program, powering to a dominating victory in the 100-meter butterfly.

Katie Ledecky blew away the field in the 800 freestyle, winning by more than 5 seconds in a race where the battle for second provided the only drama.

Ledecky locked up her fourth individual race at the Olympics with a time of 8 minutes, 14.62 seconds, adding to her victories in the 200, 400 and 1,500 free.

Leading right from the start, Ledecky was essentially racing herself. She started out under world-record pace but tailed off when it quickly became clear no one could beat her.

Ledecky finished more than 10 seconds off her world-record performance at the Rio Olympics.

Fifteen-year-old Katie Grimes outraced veteran Haley Anderson for the second spot at the Olympics, knocking more than 11 seconds off her personal best to touch second in 8:20.36.

Anderson, who already made the Olympic team in marathon swimming, just missed out on a race at the pool. She finished 15-hundredths of a second behind the youngster after a race covering 16 laps.