Olympic Times - Sports Daily

Aaron Peirsol set a new Olympic and world record in the 100m backstroke, touching the wall in 52.54 to win gold at the 2008 Beijing Olympics.
Peirsol finished more than half a second ahead of fellow American Matt Grevers who claimed silver in 53.11.
The bronze went to Arkady Vyatchanin of Russia and Hayden Stoeckel of Australia, both finished in 53.18.

source: transworldnews.com