Conversation so far:
What were John O. Brennan career highlights?
Obama twice nominated Brennan to serve as Director of the Central Intelligence Agency.
What is notable about John O. Brennan time in the CIA?
While director, Brennan created ten new mission centers in his campaign to focus the CIA on threats in cyberspace

Question: What did he do under President Bush?
Self-contained rewrite: What did John O. Brennan do under President Bush?