Event:
In Greenland. a canyon over 800km long is discovered up to 800m deep in different places below the ice sheet covering the country; the canyon is longer than Arizona's Grand Canyon; it was carved out by a river over four million years ago
More Notable Events on August 30:
1983 Guion Bluford becomes 1st African-American astronaut in space
1976 Tom Brokaw becomes news anchor of Today Show
1951 U.S. and Philippines sign mutual defense pact
1945 Hong Kong liberated from Japan
1933 Air France forms
