On this week’s Labor Heritage Power Hour: A visit to the Donora Smog Museum, where a six-day inversion in 1948 trapped toxic fumes over a mill town and changed how the U.S. thinks about work, health, and accountability. Then educator and Mine Wars Museum co-founder Wilma Steele unpacks how a simple red bandana—rooted in centuries-old paisley—became a living symbol of union solidarity.