Mine helmets and painted crosses sit at the entrance to Massey Energy's Upper Big Branch coal mine on April 5, as a memorial to the 29 miners killed there one year earlier. Jeff Gentner/AP hide caption

itoggle caption Jeff Gentner/AP

Mine helmets and painted crosses sit at the entrance to Massey Energy's Upper Big Branch coal mine April 5 in Montcoal, W.Va. The memorial represents the 29 coal miners who were killed in an explosion at the mine a year ago. Jeff Gentner/AP hide caption

itoggle caption Jeff Gentner/AP