Considering Mine Safety After W. Va. Blast Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email A sign is posted on a mailbox near the entrance to the Upper Big Branch coal mine owned by Massey Energy Company and operated by Performance Coal Company in Montcoal, West Virginia, April 6, 2010. ( SAUL LOEB/AFP / Getty ) Produced by Arwa Gunja Produced by PRI and WNYC