What got him was when he was in the Marines and was assigned a job on a ship that was being stripped to go to the scrap year. He was exposed to a lot of asbestos and later on he got Mesothelioma. That is what killed him.
My understanding is If you were exposed to asbestos you might get cancer.
If you were exposed to asbestos and smoke, you will get cancer.
I had asbestos exposure in the shipyards and shipboard. So far so good.