KDKA
| Date | Clue |
|---|---|
| 2013-02-13 | Pittsburgh radio station since 1920, said to be the world's first |
| 1997-01-06 | America's first commercial radio station |
| Date | Clue |
|---|---|
| 2013-02-13 | Pittsburgh radio station since 1920, said to be the world's first |
| 1997-01-06 | America's first commercial radio station |