Biles' words on why she chose this leotard.

Biles was at her most dominant after nearly two years off from competition.

She would be the first non-teen to win since 1971.

Results from the 2018 U.S. Gymnastics Championships in Boston.

Watch video of the blunder.

Officials learned of the incident after a newspaper published photographs.

Simone Biles finishes up her performance on Day 2 with two passes on the vault that serve as victory laps for her fifth U.S. national championship.

Simone Biles' floor routine nets a score of 14.700 on Day 2 of the U.S. Gymnastics Championships.

Simone Biles scored a 14.900 on her balance beam routine on Day 2 of the U.S. Gymnastics Championships.

Kerry Perry said she respected Simone Biles' opinion after critical comments.

Simone Biles' uneven bars routine on Day 2 of the 2018 U.S. Gymnastics Championships yields a score of 14.550.

The transfer is likely due to an assault, an expert said.

Sam Mikulak's record-tying fifth U.S. all-around title came by his largest margin of victory.

Sam Mikulak all but clinches his championship with a dominant high bar routine at the U.S. Gymnastics Championships.

Sam Mikulak impresses during his parallel bars at the 2018 U.S. Gymnastics Championships.

The Diamond League concludes with finals meets in two weeks.

Simone Biles admits that she was confident and excited entering Day 1, but that she's till working on connecting the mind and the body.

Simone Biles crushes it on the uneven bars, earning the praise of her new coach, Laurent Landi, and resulting in a score of 14.850.

Simone Biles once again proves why she is the best in the world at vault with her performance at the 2018 U.S. Gymnastics Championships.

Three-time World All-Around Champion Simone Biles performs a captivating floor routine that yields a score of 14.450.

Biles goes for national title No. 5 on Sunday.

She hasn't competed since Rio.

Biles' comeback got off to a dominant start.

She was the world's best gymnast last year until minutes before the biggest competition.

One Olympic team member plans to return in 2019.

She now has as many wins as Olympic gold medals.

New stars from the U.S. and Great Britain headline.

Nationals continue Friday with Simone Biles in action.

Sam Mikulak talks with Andrew Joyce about what he was most pleased with after his Day 1 performance at the 2018 U.S. Gymnastics Championships.

Sam Mikulak falls early on during his high bar routine at the 2018 U.S. Championships.

Sam Mikulak turns in a score of 14.300 on the parallel bars at the 2018 U.S. Championships.

Seven out of eight gymnasts between the last two Olympic teams are survivors.

She earned four medals in Seoul.

The U.S. men hope to avoid a full-fledged drought at worlds.

"I’ve always wanted a lip tat, and I heard it didn’t hurt."

Is Simone Biles‘ comeback saving gymnastics? She received plenty of feedback to that effect since her return last month.

A legendary Ethiopian champion sent an open letter.

Phelps and Milorad Cavic reflected on the memorable finish.

Harrisons' comparisons to Ronda Rousey continued in her first bout.

Hurd competes at nationals this week, live on NBC Sports.

Biles competes this summer for the first time since Rio.

The 9-year-old was on her nation's version of "Little Big Shots."

“It’s like if you’re dating someone and it goes well and you want more.”

On Katie Ledecky, Caeleb Dressel and Chase Kalisz.

One of them is extreme.

How to watch and stream nationals on NBC Sports.

The seven-time world champ detailed the accident.

Watch the video.

The U.S. women's picture is beginning to sort out.

The U.S. had its worst relay output at a major meet in 17 years.

Softball returns to the Olympics after a 12-year absence.

Camps were held at three other sites since closing the Karolyi Ranch.

Michael Andrew claws his way to first place in the 50m freestyle at the 2018 Pan Pacific Championships.