Conversation so far:
Why was Art Bell's reputation critical?
Art Bell's calm attitude, patient questions, and ability to tease substance from nebulous statements of callers and guests gave his show a relaxed yet serious atmosphere.
Who criticized Art Bell?
Art Bell was criticized for reporting rumors that Comet Hale–Bopp was being trailed by a UFO.
Did Art Bell ever do an interview about his beliefs?
On September 30, 1998, NBC's Today Show aired a taped segment of reporter Fred Francis interviewing Art Bell.
Was Art Bell ever on TV talking about his beliefs?
In 1999, Art Bell was interviewed on Larry King Live.

Question: What were his beliefs about UFO's?
Self-contained rewrite: What were Art Bell's beliefs about UFO's?