Jim Hines won the men's 100 metres at the 1968 Mexico City Olympics in 9.95 seconds.
His performance was the first electronically timed result under 10 seconds accepted as a world record. Hines benefited from the high altitude of Mexico City, where thinner air can reduce aerodynamic resistance, although altitude also creates challenges in other events.
The final was held on 14 October 1968. Jamaica's Lennox Miller won silver and the United States' Charles Greene won bronze. Hines's result remained the official world record until 1983.
Hand timing had previously produced sub-10-second marks, but electronic timing provided a more precise and consistently comparable measurement. Hines later played professional American football after his athletics career.