Event:
Australia's Sally Pearson sets a new Olympic record when she wins the 100 metres hurdles in 12.35 seconds at the 2012 Summer Olympics
More Notable Events on August 7: 1990 Desert Shield begins - U.S. deploys troops to Saudi Arabia
1987 5 Central American presidents sign peace accord in Guatemala
1976 U.S. Viking 2 goes into Martian orbit after 11-month flight from Earth
1959 Explorer 6 transmits 1st TV photo of Earth from space
1940 Churchill recognizes De Gaulle government in exile
