U.S. gymnastics superstar Simone Biles was in a different kind of spotlight on Tuesday after Russian hackers circulated confidential medical records from the World Anti-Doping Agency (WADA) database that showed her use of methylphenidate, a stimulant used to treat ADHD...The gold medalist took to Twitter to address the situation and wrote, "I have ADHD and I have taken medicine for it since I was a kid..."