Paul McCartney and Ringo Starr have shared tributes to late The Beatles bandmate George Harrison on the 20th anniversary of the latter’s passing.Harrison, who was the longtime guitarist of the Fab Four, died of lung cancer on November 29, 2001 at the age of 58.McCartney took to Twitter to share an old image of himself and Harrison in the studio with a caption reading: “Hard to believe that we lost George 20 years ago. I miss my friend so much.