Guardian: It was one of those appointments one had waited so long for and finally it happened, in a church on a Brooklyn corner: Pete Seeger in concert. It had been 16 years since I had run home, barely adolescent, clutching the LP of his concert in the Carnegie Hall on 8 June 1963, the night the American civil rights movement and a subsequent generation was handed down its anthem like an 11th commandment: “We Shall Overcome”. But it was the searing, yearning lines of another song that froze …