Peirsol wins gold in 100m backstroke at Pan Pacific

Aaron Peirsol (L) of the U.S. celebrates with Hayden Stoeckel of Australia after Peirsol won the men's 100m backstroke at the Pan Pacific 2010 swimming championships in Irvine, California August 18, 2010.Aaron Peirsol of the U.S. comes off the starting blocks during the start of the men's 100m backstroke at the Pan Pacific 2010 swimming championships in Irvine, California, August 18, 2010.(