Biles poised to reclaim Olympic throne after Tokyo tumult

The diminutive dynamo dazzled at the 2016 Rio de Janeiro Games, winning gold in all-around, vault, floor exercise and team events. She arrived at the pandemic-delayed Tokyo Olympics with superstar billing and history in her sights, but withdrew from the majority of her events as she struggled with the disorienting and "petrifying" mental block that gymnasts call the "twisties". Hailed by many as a mental health trailblazer but criticized by a few as a quitter, Biles has returned from a two-year hiatus...