Steve Darnall, host of WDCG Radio's "Those Were the Days" and publisher of "Nostalgia Digest", looks at some of the biggest shows and stars to emerge from the early years of radio, including Jack Benny, Bob Hope, Amos & Andy, and The Shadow. Listen to sound clips and stories about how radio became America's first mass medium, transforming the United States of America from 48 states into a national listening community.