FILE - In a Monday, April 5, 2010 file photo, emergency vehicles leave the entrance to Massey Energy's Upper Big Branch Coal Mine in Montcoal, W.Va. after an explosion at the underground coal mine. ... more 
FILE - In a Monday, April 5, 2010 file photo, emergency vehicles leave the entrance to Massey Energy's Upper Big Branch Coal Mine in Montcoal, W.Va. after an explosion at the underground coal mine. Former Upper Big Branch mine boss Gary May, the superintendent of Massey Energy's Upper Big Branch Coal Mine where an explosion killed 29 men, was charged Wednesday, Feb. 22, 2012 with conspiracy to defraud the federal government, becoming the second and highest-ranking Massey Energy employee to face criminal prosecution so far over the deadly blast. U.S. Attorney Booth Goodwin said his investigation of the worst U.S. mine disaster in four decades is "absolutely not" finished but did not immediately comment further. (AP Photo/Jeff Gentner, File) less 
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Associated Press | Photo By Jeff Gentner, File
Wed, Feb 22, 2012 9:33 AM EST