Across Appalachia, thousands of coal miners have suffered from black lung disease. In the 1960s, miners organized a movement to end the chronic condition. They convinced Congress to pass new laws that were supposed to make black lung a thing of the past. Today, conditions underground have changed, and the disease has come roaring back. Black lung, also known as coal workers' pneumoconiosis, is caused by long-term exposure to coal dust in the process of mining. Inhaled coal dust builds up in the