Aimee Boorman coached Simone Biles for more than a decade and helped her win five medals at the 2016 Olympics.

Aimee Boorman, author of the new book "The Balance," coached Simone Biles for more than a decade, including at the 2016 ...

Legendary gymnast Simone Biles will announce the "Riders Up" command this year at the Kentucky Derby, which will be held May ...