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55 years ago today, Bob Dylan was heckled at the Free Trade Hall in Manchester, England, by a crowd member who called him “Judas.” Contrary to popular belief, the heckler wasn’t a folk purist who felt betrayed by Dylan playing electric; it was a young seminarian named Rob Halford who thought Dylan should be playing more like a rocka rolla. Read our review of the Bootleg Series set from this time period: