Joan Baez walked onto the stage, guitar in hand, and 70,000 fans fell into a hush. “This song is for my friend, Roy Orbison,” she said softly, as his image lit up the massive LED screen behind her. The first note was enough to bring tears, her voice carrying the kind of ache only true friendship can hold. Then, halfway through, the crowd erupted — Bob Dylan was walking toward her, harmonica in hand. What followed was a duet steeped in history, heartbreak, and reverence. By the final chord, the audience knew they had just witnessed a moment that would never come again.
The summer air hung heavy and warm over the sprawling outdoor stadium, but inside, a different kind of energy crackled.…