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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Jeff Gentner/AP

Howard Berkes on 'Morning Edition'

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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

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Jeff Gentner/AP

At W.Va. Mine Explosion Memorials, Changes Promised

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