Jarl Mohn, the new President and CEO of NPR, has held almost every job in broadcast radio. He started out as a 15-year-old disc jockey in Pennsylvania. Later, he worked as a programmer and general manager, and owned a group of radio stations. He eventually ended up in cable television as the general manager of MTV and VH1. More recently, he’s become a venture capitalist, investing in digital and tech startups. Now, at the helm of NPR, he says the business side of the 45-year-old organization needs help. A conversation with Mohn about the future of public radio and his vision for NPR.