Mine helmets and painted crosses were placed at the entrance to Massey Energy's Upper Big Branch coal mine as a memorial to the 29 miners killed there.
January 17, 2013 Nearly three years after a deadly mine explosion in West Virginia, a former Massey Energy mine superintendent has been sentenced to prison and federal regulators have toughened a regulation that could have helped prevent the disaster.
Investigators examine a 20-foot long section of gas pipeline found more than 40 feet from the rupture site north of Charleston, W. Va.
December 13, 2012 The NTSB is investigating why no warning sounded in the control center of pipeline operator, Columbia Gas Transmission, when the explosion occurred.
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