World records fall in Omaha

Aaron Peirsol and Natalie Coughlin each set world records in the men’s and women’s 100metres backstroke at the United States Olympic trials in Omaha.

Peirsol lowered his own world record when he touched in 52.89seconds with Coughlin also eclipsing her own world best to become the first woman to go under the 59-second mark in 58.97secs.