Usain Bolt set his record times of 9.58 seconds and 19.19secs at the World Championships in Berlin four years ago. Matt Dunham / AP Photo
Usain Bolt set his record times of 9.58 seconds and 19.19secs at the World Championships in Berlin four years ago. Matt Dunham / AP Photo
Usain Bolt targets 100 metres record at World Athletics Championships
Olympic champion also wants to break the 19-second barrier in the 200 metres.
Press Association
July 31, 2013
