For thirty years, Robert Siegel has given us the afternoon news. Having started his career in public radio when it was a scrappy enterprise, he's spent the past three decades shaping NPR as host of All Things Considered. He retired this week, at a time when NPR plays a critical role in educating the electorate. Jeffrey Goldberg,   Atlantic’s editor in chief, turns the microphone on Robert Siegel for a change.  Learn more about your ad choices. Visit megaphone.fm/adchoices