KARSTEN WARHOLM

Alison Dos Santos of Brazil powered down the homestretch to take the 400-meter hurdles title at the world championships.

Simone Biles returned to competition at the Tokyo Games on Tuesday and won a bronze medal in the balance beam.

The world record was absolutely smashed with the fastest field ever to run the men's 400 meter hurdles. Norway's Karsten Warhom took gold and the U.S.'s Rai Benjamin won bronze.

Karsten Warholm of Norway obliterated his own world record in the Olympic 400-meter hurdles Tuesday, finishing in 45.94 to crack the old mark by.

Karsten Warholm of Norway obliterated his own world record in the Olympic 400-meter hurdles Tuesday, finishing in 45.94 to break the old mark by .76. Second-place finisher Rai Benjamin of the United States finished in 46.17, also bettering the 46.7 record that Warholm set just last month. Alison dos Santos of Brazil finished third in 46.72, as six of the eight runners broke either a world, continent or national record.

The Jamaican sprinter and her Olympic-record time captured everyone’s attention.

The so-called playbook for athletes at the Tokyo Olympics provides a guide to a “safe and successful Games."