U.S. Gymnastics team coach Aimee Boorman prepares the uneven bars during the women's team final at the...
U.S. Gymnastics team coach Aimee Boorman prepares the uneven bars during the women's team final at the World Gymnastics Championships at the Hydro arena in Glasgow, Scotland, October 27, 2015. At just 4 feet 9, Simone Biles' petite frame barely reached the ears of Olympic champion Gabby Douglas, when the American team were introduced to the crowd at the gymnastics world championships in Glasgow on Tuesday. Yet it is thanks her lack of height that the pint-sized dynamo is head and shoulders above her rivals and is already being feted as the greatest gymnast to have graced the sport -- even though she has yet to make her Olympic debut. Under the careful guidance of her lifelong coach, Aimee Boorman, Biles has become such a force in the sport that her rivals now think she is "wired like a robot". REUTERS/Phil Noble