Simone Biles is being called the greatest gymnast of all time, a sporting superstar who stunned audiences at the Rio Olympics. But now, at 19, she is ready to reflect on what lies ahead and to look back at the circumstances that have shaped who she is. Adopted by her grandparents as her biological mother struggled with drink and drug addiction, Simone Biles' life story is almost as remarkable as her leaps and tumbles.