Many Americans grew up with a transistor radio somewhere in the home. Out of it emanated the commentaries, stories, news, and analysis. Public radio was a key means of getting information. But between podcasts, satellite radio and on-demand streaming, some argue that signal is fading. Nimble upstarts and emerging technologies have created wildly successful new platforms, enabling a broad diversity of creators to broadcast their views. What does this mean for the future of public radio? Intelligence Squared host and moderator John Donvan moderates a debate between two media luminaries, who zero in on this existential question: Is public radio still relevant?