Sprinter Noah Lyles storms to 200-meter gold at World Championships, leading U.S. sweep. He breaks Michael Johnson's 1996 record.

The 25-year-old Lyles was the defending World champion but at the Tokyo Olympics last summer was disappointed.

Lyles said. "This feels great because I've been waiting for America to dominate since I got on the platform."

Noah Lyles sets American record in 200 meters, wins world title in 19.31 seconds as U.S. men take top 3 spots at track.

Noah Lyles knew he had run the best race of his life — and maybe the best 200 meters any American had ever run.

"I didn't want to see '32,' I didn´t want to share a record," Lyles said of his reaction immediately after the race.

Professional track sprinter Lyles pounded his hand on the track four times, stood up straight and ripped off his jersey.

He grabbed his medal from the presenter, then went over and hugged his family and took hold of an American flag.

He was unflinching about his mental-health struggles. "The mental health I had in that moment is what makes this moment also great," Lyles said.

Noah Lyles' 19.31 was the third-fastest time in history, behind only Usain Bolt's 19.19 in 2009 and a 19.26 run two years later by Yohan Blake.