Conversation so far:
What did Casey Kasem have to do with the American Top 40?
Casey Kasem along with Don Bustany, Tom Rounds, and Ron Jacobs, launched the weekly radio program American Top 40. He was co-creator and the host of the show.
When did Casey Kasem, Don Bustany, Tom Rounds, and Ron Jacobs launch American Top 40?
Casey Kasem, Don Bustany, Tom Rounds, and Ron Jacobs launched American Top 40 on July 4, 1970.
What else happened with Casey Kasem during the time he launched American Top 40?
In 1983, Casey Kasem helped found the American Video Awards, an annual music video award show taped for distribution to television, which he also hosted and co-produced.

Question: How long did the show run?
Self-contained rewrite: How long did American Top 40 run?