Conversation so far:
When did Walter Cronkite get started at CBS News?
In 1950, Cronkite joined CBS News.
How did Walter Cronkite get the job at CBS News?
He received a job offer from Edward R. Murrow at CBS News to join the Murrow Boys, relieving Bill Downs as the head of the Moscow bureau.
How long did Walter Cronkite stay at CBS News?
Walter Cronkite served as anchorman for the CBS Evening News for 19 years.

Question: What kinds of things did he cover there?
Self-contained rewrite: What kinds of things did Walter Cronkite cover at CBS News?