Gymnastics-Biles to compete in sixth world championships

Simone Biles, the most decorated American gymnast, is set to compete in her sixth world championships.

The world championships will take place in Stuttgart, Germany.

Biles has won a total of 20 Olympic and World Championship medals.

She is the reigning Olympic and World all-around champion.

Biles has been training new skills, including a triple-twisting double back on floor exercise.

She will be joined by fellow American gymnasts, including Sunisa Lee and Kara Eaker.