The American team of Nathan Adrian, Cullen Jones, Ben Wildman-Tobriner and Matt Grevers took down the world record from the 3:12.46 set by USA in 2006, to 3:12.23 this morning.
Source: SwimInfo
USA Breaks World Record In 400 Free Relay Prelims
By rokur
rokur
Production engineer and certified swim coach. Full-time IT consultant, spare-time swimming aficionado. 2 sons, 2 daughters and a wife. President of the Faroe Islands Aquatics Federation. Likes to run :-)