As the most important stories of the second half of the 20th Century unfolded, America’s public radio and television stations were there, covering them in their own unique way. But whatever material exists is scattered across the country, and much of it is stored on formats that are susceptible to age. Now for the first time a project is underway to collect and archive 40,000 hours of public broadcasting. We talk with the leader of the project. (Photo courtesy of BSO Archives)