Katie Ledecky extended her 12-year win streak in her trademark event by winning the 800m freestyle on the first day of the five-day U.S. Swimming Championships in Irvine, California, on Tuesday.

Ledecky, who owns the 29 fastest times in history in the event, clocked 8 minutes, 12.03 seconds and won by 19.89 seconds over Kensey McMahon. Read More