The federal mine-safety agency said regulators failed to identify numerous hazards at a Massey Energy Co. mine before a 2010 explosion killed 29 miners.
WSJ.com: What's News US, Wall Street Journal
Tue, 03/06/2012 - 10:57am
The federal mine-safety agency said regulators failed to identify numerous hazards at a Massey Energy Co. mine before a 2010 explosion killed 29 miners.