Johnny Cash's son tells Nathan Carter about his love for Ireland

He went on to tell the singer the story behind is famous hit 40 Shades of Green and how it led to a moment cherished moment with president John F Kennedy.

The only son of Johnny Cash and June Carter, John Carter Cash has opened up to Nathan Carter about his dad’s love for Ireland.

RTÉ crew filmed the Liverpudlian as he traveled to the home of country music for the documentary, Nathan goes to Nashville.