Usain Bolt set a new world record in the 100 meters May 31 with a time of 9.72 seconds at the Reebok Grand Prix in New York, .02 seconds faster than the old record held by fellow Jamaican, Asafa Powell.

Bolt was using the 100 for "speed work" and to avoid having to run the more grueling 400, when, suddenly, he ran the world's second-fastest time last month at 9.76. Even then, he said he wasn't sure if he would give up the 400 meters for the 100 at the Beijing Olympics.