Paul McCartney reflects on The Beatles’ new song ‘Now and Then’: ‘John’s voice, crystal clear’

When surviving Beatles Paul McCartney and Ringo Starr heard John Lennon singing anew on “Now and Then” — a brand new Beatles song that will be released on Thursday — it was like their former bandmate had miraculously come back to life four decades after he was murdered. “And there it was — John’s voice,...