“WHEN THREE VOICES BECAME ONE.” The room fell silent as Paul McCartney stepped into the warm light, flanked by Mary and Stella. No spectacle — just family. Paul strummed the first notes of “Blackbird,” and Mary carried the opening line with a softness that made the whole room tremble.
“Blackbird,” released on The Beatles (White Album) in 1968, stands as one of Paul McCartney’s...