Bolt strikes twice, with a second WR

Usain Bolt completed his sprint double Wednesday with a gold medal in the men's 200m.

Once again, the Jamaican blew away the field, but this time he ran through the finish and with a 19.30 broke Michael Johnson's world record.

Churandy MARTINA of Netherlands Antilles got the silver, several strides back at 19.82.

American Wallace Spearmon finished third but was disqualified for stepping on a lane line. That gave the bronze to teammate Shawn Crawford, who entered as the defending Olympic champion. (Full results)

The final American, Walter Dix, was fourth.

On Saturday night, Bolt won the 100m with a world record of 9.69 seconds. He began his celebration with 20 meters to go, throwing his arms in the air and pounding his chest as he crossed the finish.

Bolt is the first man since American Carl Lewis in 1984 to sweep the 100m and 200m gold medals at an Olympics. He is also the first man ever to break the world marks in both sprints at an Olympics. Not even Lewis or Jesse Owens managed that.

Showing what he can do when he runs at full speed all the way through the finish - something he hadn't done yet in the Beijing Games - Bolt eclipsed the old record of 19.32 seconds set by Michael Johnson in Atlanta in 1996. source