I think ABC Radio's "Perspective" is still around in 2 parts. My Sunday morning air shift at my first station included "Voices in the Headlines (which became "World News This Week" as the Information network switched up branding to match TV, and Perspective Part 1. The Contemporary network had Howard Cosell's "Speaking of Everything", and there was a replay of "Issues and Answers" (later "This Week with David Brinkley" the radio network sent down in the evening