Support WBURSafety System Dysfunctional Before Mine BlastPlay05:25Download AudioHoward BerkesJanuary 14, 2011 ShareWest Virginia State Police direct traffic at the entrance to Massey Energy's Upper Big Branch coal mine in Montcoal, W.Va., on April 5. (AP)
West Virginia State Police direct traffic at the entrance to Massey Energy's Upper Big Branch coal mine in Montcoal, W.Va., on April 5. (AP)