The city of San Francisco begins issuing marriage licenses to same-sex couples in response to a directive from Mayor Gavin Newsom.
The first parkrun, then known as the Bushy Park Time Trial, takes place in Bushy Park, London, UK
A supermarket fire kills 396 people and injures 500 others in Asunción, Paraguay.
Google announces Gmail to the public.
Facebook, a mainstream online social networking site, is founded by Mark Zuckerberg.
Hajj pilgrimage stampede: In a stampede at the Hajj pilgrimage in Saudi Arabia, 251 people are trampled to death and 244 injured.
Ruzhou School massacre: A man stabs and kills eight people and seriously wounds another four in a school dormitory in Ruzhou, China.
New Zealand Tomb of the Unknown Warrior is dedicated at the National War Memorial, Wellington.
The Boston Red Sox defeat the St. Louis Cardinals to win their first World Series in 86 years.
Beslan school siege results in over 330 fatalities, including 186 children.