Now 50 years later comes Look Again to the Wind: Johnny Cash's Bitter Tears Revisited, which features new recordings by such artists as Emmylou Harris, Kris Kristofferson and Gillian Welch. Produced by Joe Henry, the tribute album is set for release Aug. 19.

"Prior to Bitter Tears, the conversation about Native American rights had not really been had," Henry said in a press release, "and at a very significant moment in his trajectory, Johnny Cash was willing to draw a line and insist that this be considered a human rights issue, alongside the civil rights issue that was coming to fruition in 1964. But he also felt that the record had never been heard, so there's a real sense that we're being asked to carry it forward."

Related: Rosanne Cash on the Southern Influences Behind Her New Album The River and the Thread