FILE - In this April 7, 2010, file photo, Chris Adkins COO of Massey Energy Co., second from left, speaks to MSHA officials near the drilling above Massey Energy's Upper Big Branch Coal Mine, in Montcoal, W.Va. Five years after the blast that killed 29 West Virginia coal miners, authorities stepped up enforcement efforts and pledged to seek out dangerous mines. But federal officials continue to find explosion risks at some underground mines, including many in states like Kentucky and West Virginia with long histories tied to coal. (AP Photo/Jeff Gentner, Pool, File)