Goodyear and other rubber companies in Akron began insulating their tire factories with asbestos and using it in manufacturing at least as far back as the early 1900s, sold on the mineral’s malleability and imperviousness to chemicals, heat, electricity and water. While much has changed, internal company memos and other documents dating to the early 1900s indicate that companies throughout the rubber ecosystem were not only aware of the dangers of various chemicals, such as asbestos and benzene, but that some also attempted to conceal the risk these substances posed, as Sakol indicated in his testimony about the blood screenings his leukemia patients received at the rubber plants.