John Wayne’s final years: ‘Exhausted’ Duke’s secret oxygen mask discovery left him furious

JOHN WAYNE’s last few movies saw the Western legend’s co-stars and crew remember a physically weakened Duke, who was determined to carry on despite being on what he called “borrowed time”. The star even had a special oxygen mask and “exploded” at a photographer when caught using it out of sight, trying desperately to protect his macho screen image.
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