A guard sits in his truck at the entrance to the Darby Coal Mine in Holmes Mill, Kentucky, on May 20, 2006 – the day an explosion in the mine killed five miners. The owners of the mine later failed to pay nearly $3 million in penalties for mine safety violations at Darby and other mines.

A guard sits in his truck at the entrance to the Darby Coal Mine in Holmes Mill, Kentucky, on May 20, 2006 – the day an explosion in the mine killed five miners. The owners of the mine later failed to pay nearly $3 million in penalties for mine safety violations at Darby and other mines.