Coming into these trials, Rivera was contending for an alternate position at best. Now, she could be going to her first Olympic Games.

She gave a lights-out performance tonight, scoring a 56.325 in the all-around. The work is done; it's a waiting game for her and her Olympic dreams.

A 4-year-old golden retriever named Beacon is here to support Team USA after a tough week in Minneapolis.

He is USA Gymnastics' first official therapy dog and even wears "Goodest Boy" credentials around his neck.

"Thank god for Beacon," Suni Lee said in an Instagram post.

She competed through tears in the first rotation Friday, successfully landing a precarious double-twisting Yurchenko after witnessing back-to-back injuries on the skill. She watched Jones injure her knee and her close friend and roommate, DiCello, rupture her Achilles performing the vault.After the meet, Beacon roamed the competition floor, comforting Lee and the other athletes after a stressful start to trials. Mental health professionals will also be onsite after the Olympic team is announced, according to USA Gymnastics.

Today hasn't been Suni Lee's best day, but she will still have a strong all-around score and is in an excellent position to return to the Olympics.

She landed her vault with her feet slightly staggered to protect her wrapped ankle from injury and scored a 14.100, her best vault score all year.

If Biles performs well on the floor exercise, she will finish first in the all-around and mathematically secure her ticket to Paris.

The top three all-around gymnasts have all had falls on beam now, with Chiles coming off at the end of the third rotation.

That makes Rivera's case for an Olympic spot quite strong. She has the highest score of the night so far on beam, an event on which the U.S. is suddenly looking unstable.

After Rivera's world-class beam routine in the last rotation, Sumanasekera performed a clean set in response. However, her 13.950 will fall short of Rivera's score.

Rivera performed on floor shortly after and stumbled out of her last tumbling pass. That will keep things interesting heading into the last rotation.

Tonight, Biles is expected to become the first American female gymnast since Dominique Dawes to be named to three Olympic teams. At her first Olympic trials in 1992, she was the first Black gymnast to ever qualify.

"To see women of color dominating the sport of gymnastics 32 years later definitely gives me reason to at least know that the sport is becoming a little bit more inclusive," Dawes said in an interview with NBC News yesterday.

Dawes was a member of the "Magnificent Seven" team that won gold at the 1996 Olympics in Atlanta, as well as the 1992 and 2000 medal-winning teams. The pressure, she said, "heightened with each Olympics."

"As I got older, I understood the magnitude behind what it was about," she said. "You're not only representing your country, but I was also representing my race. Winning that gold on American soil, Kerri Strug's vault and the way it played out on NBC was such an iconic moment for our country, and it was an honor and very humbling to be a part of it."

Even Olympic medalists on the balance beam fall off the 4-inch apparatus sometimes.

Biles' beam routine started strong, but she came off on one of her easiest skills, a side aerial. Her Olympic chances remain unchanged; she will stay in first place.

Now that the best American beam workers, Lee and Biles, have both fallen today, Rivera's 14.275 is even more compelling.

Biles also fell on beam on Day 2 of Olympic trials for both Rio and Tokyo.

A natural performer on the floor exercise, Leanne Wong synthesized elegant dance and clean tumbling in the third rotation. Hezly Rivera may have bested her on beam, but Wong did not let that rattle her.

She raised her score by half a point from Day 1, scoring a 13.625.