Event:
Yordanka Donkova of Bulgaria sets 100m hurdle woman's record (12.21)
More Notable Events on August 20: 1982 U.S. Marines land in Beirut, Lebanon
1980 Mount Everest climbed by Italian Reinhold Messner, alone
1977 NASA launches Voyager 2 towards Jupiter, Saturn, Uranus and Neptune
1929 1st airship flight around Earth flying eastward completed
1741 Alaska discovered by Danish explorer Vitus Bering
