Most people don't think about a radio station changing format until, suddenly, it happens. One day, you turn on your favorite station and it's not there anymore. It's playing programs you don't recognize, or maybe has a different name. It's all part of a process that starts when the station is sold. The old owner departs, and the new owner takes over. People who worked there for years lose their jobs. Perhaps a small group of fans who liked the old station will try to save it. They'll write letters and sign petitions. But the FCC won't step in, and...