I read something once that claimed that the cancer that killed John Wayne was not from smoking but from resulting from his being downwind of some above-ground atomic testing (carried out in Nevada while he was in southern Utah filming a movie). I’m not sure if that is true.
I’m not sure, but I thought it was stomach and/or intestinal cancer that killed him.
It was a movie he made about Ghengis Khan in the 1950s. It was filmed in Utah or some place like that near where the bomb. I understand quite a few who were involved with making that flick came down with cancer. But since actors in those days smoke liked chimneys (usually, unfiltered Camels or Luckies), and drank hard liquor like water, I don’t know if, statistically, it can be proven.