On this day in history, Letterman joins Late Night on CBS, August 30, 1993
1993: CBS' "The Late Show with David Letterman" airs for the first time. David Letterman left his late night spot at NBC and joined CBS.
Other Events on August 30:
1905: Ty Cobb, baseball hall-of-famer, made his debut with the Detroit Tigers.
1965: Bob Dylan's "Highway 61 Revisited" album was released.
1967: Thurgood Marshall was appointed to the Senate, becoming the first African-American justice on the Supreme Court.
1983: Guion Bluford Jr. becomes the first African-American astronaut to travel in space.
2013: A 7.0 magnitude earthquake struck off the shore of the Alaskan island of Adak.