Black-Lung Rule Loopholes Leave Miners Vulnerable NPR 0 Randall Gross US NewsJuly 2012Tuesday, July 10, 2012 at 4:32 am PDT • Views: 1,283 npr.org Black-Lung Rule Appalachia Region Coal Miners Coal Dust Eastern Kentucky Medical Experts Severe Stages Southwestern Virgina Tough New Limits UMWA United Mine Workers Weak Enforcement