Family members mourn in front of a coffin containing the remains of Eva Melchor, a victim of the Mexico oil company office building explosion, at a cemetery in Mexico City, Saturday,

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Family members mourn in front of a coffin containing the remains of Eva Melchor, a victim of the Mexico oil company office building explosion, at a cemetery in Mexico City, Saturday, Feb. 2, 2013. Melchor died Thursday, in a blast that collapsed the lower floors of Petroleos Mexicanos, or Pemex, headquarters, crushing at least 33 people beneath tons of rubble and injuring 121. (AP Photo/Marco Ugarte) less