Usain Bolt makes it a double - gold in 200m!
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 [...]