
How the world records were shattered
Men's 100 metres world record progression:

Bolt |
The first record in the 100 metres for men (athletics) was recognized
by the International Amateur Athletics Federation, now known as the
International Association of Athletics Federations, in 1912.

Asafa Powell |
(Starting January 1, 1977, the International Association of Athletics
Federations (IAAF) required fully automatic timing to the hundredth of a
second for these events. Jim Hines' October 1968 Olympic gold medal run
was the fastest recorded fully electronic 100 metre race to that time,
at 9.95.
Track and Field News has compiled an unofficial list of automatically
timed records starting with the 1964 Olympics and Bob Hayes' gold medal
performance there.)

Bob Hayes |
Men’s 100 metres world record progression under electronic timing
(seconds) 10.06 Bob Hayes of United States in Tokyo, Japan on October
15, 1964 10.03 Jim Hines of United States in Sacramento, USA on June 20,
1968 10.02 Charles Green of United States in Mexico City, Mexico on
October 13, 1968 9.95 Jim Hines of United States in Mexico City, Mexico
on October 14, 1968 9.93 Calvin Smith of United States in Colorado
Springs, USA on July 3, 1983 9.83 Ben Johnson of Canada in Rome, Italy
on August 30, 1987 9.93 Carl Lewis of United States in Rome, Italy on
August 30, 1987 in Zürich, Switzerland on August 17, 1988 9.92 Carl
Lewis of United States in Seoul, South Korea on Septem ber 24, 1988 9.90
Leroy Burrell of United States in New York, USA on June 14, 1991 9.86
Carl Lewis of United States in Tokyo, Japan on August 25, 1991 9.85
Leroy Burrell of United States in Lausanne, Switzerland on July 6, 1994
9.84 Donovan Bailey of Canada in Atlanta, USA on July 27, 1996 9.79
Maurice Greene of United States in Athens, Greece on June 16, 1999 9.78
Tim Montgomery of United States in Paris, France on Septem ber 14, 2002
9.77 Asafa Powell of Jamaica in Athens, Greece on June 14 and Asafa
Powell of Jamaica in Gateshead, England on June 112005,Justin Gatlin of
United States, in Doha, Qatar on May 12, 2006, , 2006 in Zürich,
Switzerland on August 18, 2006 9.74 Asafa Powell of Jamaica in Rieti,
Italy on September 9, 2007 9.72 Usain Bolt of Jamaica in New York, US on
May 31, 2008 9.69 in Beijing, China on August 16, 2008 9.58 in Berlin,
Germany on August 16, 2009
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