One has to run under 10 seconds in order to be part of the world's best.

For the first time tonight, the entire field in a women's 100-meter sprint had previously run under 11 seconds.

Powell has run under 9.90 seconds 34 times, 26 of which are in the 9.80 to 9.89 range.

We need to have at least one more person running 400m under 45 seconds.

"I could run the last 100 under 12 seconds 49 times in 50 races," he said proudly.

I don't think that anyone has run under 49 seconds until now.

The gold was unexpected, given that Young had not run under 45 seconds the past two years.

And no one else has run under 10 seconds this year.

Running under 4.5 seconds in the 40-yard sprint is considered good.

He was the first man to run the event under 49 seconds.