Conversation so far:
What was Walter Cronkite's earliest job?
He entered broadcasting as a radio announcer for WKY in Oklahoma City, Oklahoma.
How long did Walter Cronkite stay with WKY?
He left WKY radio within a year.
What did Walter Cronkite do after leaving WKY?
Walter Cronkite was a sports announcer at KCMO in 1936 with the on air name of Walter Wilcox.

Question: What did he do for the United Press?
Self-contained rewrite: What did Walter Cronkite do for United Press International?