FILE – In this July 22, 2010, file photo, former Massey Energy CEO Don Blankenship speaks at the National Press Club in Washington. Blankenship recently finished a year in prison for conspiracy to violate federal mine safety standards at Upper Big Branch, where 29 miners were killed in an explosion in 2010. Massey told The Associated Press on Friday, May 19, 2017, that he will keep up his fight for vindication and to try to convince people that natural gas, and not methane gas and excess coal dust, was the root of the explosion. (AP Photo/Jacquelyn Martin, File)