West Virginia State Police direct traffic at the entrance to Massey Energy's Upper Big Branch coal mine in Montcoal, W.Va., April 5, 2010. AP hide caption

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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

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A couple of elk escape the wildfire in the forest around the Lee Valley Recreational area in the Apache National Forest during back burn operations as the Wallow Fire continues to burn June 12, 2011 in Big Lake, Arizona. Kevork Djansezian/Getty Images hide caption

itoggle caption Kevork Djansezian/Getty Images