Katie Ledecky Smashes Her Own World Record in 400 Freestyle - The New York Times
Japanese star Seto misses in 400 IM as Olympic swim starts - The San Diego Union-Tribune
Canadian swimmer McIntosh sets women's world record in 400-metre freestyle | CTV News
Katie Ledecky, SoCal's Kevin Vargas sweep 400 IM titles at U.S. swimming nationals – Orange County Register
Swimmer Ariarne Titmus sets 400-meter freestyle world record | NBC4 WCMH-TV
How Many Laps Is 400 Meters in a Pool?
Matt Fallon Breaks National High School Record in 400 Meter Free
/cdn.vox-cdn.com/uploads/chorus_asset/file/22737678/1330367421.jpg "2020 Tokyo Olympics: Virginia swimmer Emma Weyant in 400IM Finals - Streaking The Lawn")
2020 Tokyo Olympics: Virginia swimmer Emma Weyant in 400IM Finals - Streaking The Lawn
Ariarne Titmus to face Katie Ledecky in Tokyo 400m freestyle final, Kaylee McKeown sets Olympic record - ABC News
Improve Your 400m IM with this Set
Mixed 400m Medley Relay Final | 2018 TYR Pro Swim Series – Austin - YouTube
Katie Ledecky Wins Gold in 400-Meter Freestyle at the Rio Olympics - WSJ
How to swim faster 400 meter freestyle - Swim Coach App - Smart Trainings for Swimming and Triathlon
American Katie Ledecky sets swim world mark in winning 400m
Canada's Summer McIntosh breaks world record in 400 freestyle
World swimming championships: Katie Ledecky reclaims 400 meters title
History made: Ledecky wins first-ever gold in 1500m freestyle
Olympics-Swimming-Tunisia's Hafnaoui hopes surprise 400 freestyle gold makes family proud
Katie Ledecky smashes world record to win Olympic gold in 400-meter freestyle - The Washington Post
Ariarne Titmus and Katie Ledecky set for showdown in 400m freestyle final | Tokyo Olympic Games 2020 | The Guardian
Flying start: American swimmers do just fine without Phelps | WATE 6 On Your Side
Swimming: Teenager Summer McIntosh smashes 400m freestyle swimming world record at Canadian trials
Morgan Stickney wins gold in 400-meter freestyle S8 final in Tokyo
Men's 400m Freestyle A Final | 2018 Winter National Championships - YouTube
