Two-time Grammy nominee Sierra Hull has reached the pinnacle of bluegrass on her chosen instrument, the mandolin. But how she got there is a story like no other. Special Correspondent Tom Casciato has ...

Marty taught himself to play mandolin and guitar and, by 12, was playing in a bluegrass group. The following year, after sitting in with Lester Flatt’s band, The Nashville Grass, he was asked to ...