Usain Bolt break world record at 9.58 to win 100min final in Berlin
Usain Bolt has broken the 100m world record with a time of 9.58sec in the final of the World Athletics Championship. He break the world record he set in last year's Olympic game in of 9.69sec.Usain bolt "I was feeling good after the semis. I knew it was going to be a great race and I executed it," Bolt said. "It's a great time, a great feeling, I feel good in myself and I knew I could do it."