America Had No Fireproof Armor in 1941 — So Johns Manville Wrapped Every Tank Engine in Asbestos
During World War II, American tanks, planes, ships, and military equipment were insulated with asbestos to protect against fire and extreme heat; this material saved lives in the short term but caused long-term lung diseases and cancer. **Johns-Manville**, the largest supplier, knew of the risks since the 1920s but concealed the information to protect profits. Soldiers and workers were exposed, and many developed asbestosis and mesothelioma decades later. Billions in lawsuits followed, yet asbestos left a lasting, deadly legacy of the war.
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