Rev. Alejandro Solalinde, right, and Mexican Senator Rosario Ibarra, left, participate in the "Step by Step Caravan Towards Peace" in Mexico City, Monday, Aug. 1, 2011. Hundreds of Central American ... more 
Rev. Alejandro Solalinde, right, and Mexican Senator Rosario Ibarra, left, participate in the "Step by Step Caravan Towards Peace" in Mexico City, Monday, Aug. 1, 2011. Hundreds of Central American relatives of dead or missing migrants traveled to Mexico CIty in an effort to pressure Mexican authorities to do more to guarantee the human rights of migrants traveling north towards the United States. (AP Photo/ Marco Ugarte) less 
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Associated Press | Photo By Marco Ugarte
Mon, Aug 1, 2011 5:59 PM EDT