Usain Bolt has won his second gold medal and makes it a double in the 100 and 200 meters.

He also set a new world record of 19.30, breaking it by just 2/100ths of a second.

Bolt turns 22 tomorrow, so he has 2 more reasons to celebrate.

Churandy Martina from Netherlands Antilles came second with a time of 19.82 and Shawn Crawford from the