Dye walks out!

During today's mine safety and health hearings on Capitol Hill, acting MSHA director David Dye walked out of the proceedings. Even after Sen. Arlen Spector (R-Pa.) specificially asked him to stay and answer questions, Dye had the audacity to leave. I realize he is only the acting director, but is anyone at the agency going to display any accountability at all? It is indeed dark times at the Mine Safety and Health Agency. Your comment?