Some federal regulators and coal industry officials don't see why such requirement is needed. But, a wife of a miner killed at Darby Mine in an eastern Kentucky mine explosion says she believes her husband might be alive today if he'd had a detector.
At the mine only the foremen and roof bolters carried detectors to warn of dangerous gas levels. Safety advocates believe all miners need to have detectors. Officials believe methane caused the explosion that killed the five miners on May 20.