Days before becoming Heavyweight Champion in 1964, boxing legend posed with Fab Four during their maiden U.S. tour
Before "Who Cares About the Next Generation" concert, singer looks back at Sixties shows and ahead to post-tour life
Former Beatle also calls Kanye West a "crazy" inspiration
Two members of the Little Rock Nine visit singer backstage at Arkansas concert
"Thank you for all your love and kindness," Ringo Starr tweeted in tribute to producer
From the "Revolution" intro to the "I Feel Fine" riff, here are five times when the Fab Four swiped musical material from their influences
Forestry officials revitalize ashram where much of 'The White Album' was written
Rarely seen 'Sgt. Pepper's' clip features appearances by Mick Jagger and Keith Richards
Available on DVD and Blu-ray, the most deluxe edition will contain 50 clips and a book
A look back at Fab Four's most intriguing instrumental switch-ups