Support WBURBlack Lung Study Finds Biggest Cluster Ever Of Fatal Coal Miners' DiseasePlay06:06Download AudioHoward BerkesAdelina LancianeseFebruary 06, 2018 ShareIn this historical image, a doctor reviews an X-ray of a patient with black lung disease. Federal researchers say they've now identified the largest cluster ever recorded of the most advanced stage of the disease. (Getty Images/Science Source)
