On this episode of Our American Stories, asbestos began as a miracle. It could resist heat and strengthen concrete, and it seemed to promise safety in every home and factory it touched. For decades, people believed it was the key to a safer modern world. Then the coughing started, and the walls themselves became a threat. The History Guy shares the story of asbestos from its first mining to its slow discovery as a killer hidden in plain sight.

Support the show (https://www.ouramericanstories.com/donate)