Faulty Safety Systems Failed To Stop Mine Explosion

NPR News has learned that safety systems were not working properly before that blast at the Upper Big Branch coal mine. Some mine safety experts believe these water-based safety systems might have helped prevent the blast if they all had been working together properly. Host Scott Simon speaks with NPR's Howard Berkes about new developments in the investigation of last year's coal mine explosion.

Anna Friel Anna Kournikova Anna Paquin AnnaLynne McCord Anne Marie Kortright