Prior to 1976, race times were only kept to the tenth of a second. As of January 1, 1950 the world record in the 100 meter dash was 10.2 seconds and had been achieved by four athletes: Jesse Owens, Harold Davis, Lloyd LaBeach, and Barney Ewell.
Jim Hines of the United States won gold in the 100 meter dash at the 1968 Olympic Games in Mexico City with a time of 9.95 seconds.
Maurice Greene of the United States in a time of 9.87 seconds.
usian bolt
That was 11.0 seconds, a new Olympic and World Record, by Wyomia Tyus of the United States.
The mile is not contested in the Olympics.
01:25 IST and 20:55 GMT
2:06:32 by Samuel Wanjiru of Kenya, a new Olympic record.
14:34.56 set by Grant Hackett, of Australia
1992 Games in Barcelona.
Matt Biondi of the U.S.A. with a time of 48.63.
In the 2012 Olympics Usain Bolt won the 100 Meter with a time of 9.6, a new Olympic record.
Michael Johnson of the USA with a time of 43.49.