U.S.'s Ledecky, Australia's Titmus to Face Off in 400-Meter Freestyle

Tokyo Olympics: Katie Ledecky Looks Back on Journey to Olympics. U.S. swimmer Katie Ledecky will compete in the Tokyo Games' women's 400-meter freestyle final against Australia's Ariarne Titmus, in one of the most closely watched Olympic rivalries. Stream the event here at 10:20 p.m. ET, or watch live in primetime...