AdvertisementRio Highlights: U.S. Megastars Shine Bright — Phelps, Ledecky, BilesAugust 09, 2016Greg MyrefacebookEmailSimone Biles of the U.S. performs on the floor during the women's team final on Tuesday. Biles led the American squad to a runaway victory as the U.S. successfully defended the gold they won four years ago. (AP)