A stack of reports sits on a table while independent investigator Davitt McAteer holds a news conference discussing his findings about the Upper Big Branch Mine Disaster on Thursday.

Then-Gov. Joe Manchin points at a mine map while briefing the media during the weeklong effort to find survivors after the April 5, 2010, explosion at Massey Energy's Upper Big Branch Mine.

The American flag and the Massey Energy flag are seen at half-staff on April 9, 2010, in Rock Creek after the mine explosion at Massey's Upper Big Branch Mine near Montcoal.