Michael Phelps Breaks 100 Fly World Record at US Nationals

The 14-time Olympic gold medalist swam the two-lap final in 50.22 seconds at the Indiana University Natatorium on Thursday night.

He lowered Ian Crocker’s mark of 50.40 set at the 2005 world championships in Montreal.

Source:
http://www.latimes.com/sports/nationworld/wire/sns-ap-swm-world-record-100-butterfly,1,3435720.story