Mass Grave Unearthed as Colombia Tries to Heal 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 General view of 'La Escombrera' rubbish dump in the Comuna 13 shantytown in Medellin. Up to 300 people are thought to be buried in a mass grave here. ( RAUL ARBOLEDA/AFP / Getty ) Produced by Jillian Weinberger Produced by PRI and WNYC