Fifty summers after Woodstock. First, Kurt Andersen talks with Sha Na Na co-founders Robert Leonard and George Leonard about the utter incongruity of a ’50s throwback band taking the stage at the festival. The Jimi Hendrix version of the national anthem on the last day of the festival that embodies the chaos and distortion of the time. How the Sly and the Family Stone album "Stand!" dropped at a moment of intense cultural and political change, and provided a soundtrack for that fight. And the surprising power of the other Woodstock — the “Peanuts” character named after the festival.