At age 15, she was the youngest American competitor at the 2012 Summer Olympic Games in London
Won a gold medal in the 800m freestyle at the 2012 Olympics, breaking Janet Evans' American record in the event, which stood since 1989
Won five gold medals at the 2015 World Championships in Kazan, Russia, including a near-sweep of the freestyle events (200m, 400m, 800m and 1500m) and set two new world records (in the 800m and 1500m, respectively)
Deferred enrollment at Stanford University in order to focus on the 2016 Summer Olympics in Rio de Janeiro
At the 2016 Olympics in Rio, won golds in the 200m free, 400m free and 800m free, the 4x200m relay, and a silver as part of the 4x100m freestyle relay
Volunteers with the Wounded Warrior Project at the Walter Reed Bethesda Naval Medical Center