Let us lookl now at the signification of Usain Bolt’reccord! The first world record in the men's 100 meters in 10.6 seconds.was in 1912. It was beaten only in 1921 - 10.4 seconds. The limit of 10 seconds was overcomed only in 1968, :Jim Hines ran a hundred meters in 9.9 seconds. And in 2009 Usain Bolt ran the distance in 9,58 seconds! Since, his record was not broken even by himself–Finely at the Olympics he ran the distance in 9,81: only one second in hundred years !!!!!