FILE - In this Aug. 22, 2010 file photo, Chile's President Sebastian Pinera holds up a plastic bag containing a message, from miners trapped in a collapsed mine, that reads in Spanish "We are ok in the refuge, the 33 miners" in Copiapo, Chile. Chile marks on Sunday, Aug. 5, 2012 the two year anniversary since 33 miners were trapped in the mine that collapsed and trapped them for 69 days before their rescue. (AP Photo/Hector Retamal, File)

Associated Press
FILE - In this Aug. 22, 2010 file photo, Chile's President Sebastian Pinera holds up a plastic bag containing a message, from miners trapped in a collapsed mine, that reads in Spanish "We are ok in the refuge, the 33 miners" in Copiapo, Chile. Chile marks on Sunday, Aug. 5, 2012 the two year anniversary since 33 miners were trapped in the mine that collapsed and trapped them for 69 days before their rescue. (AP Photo/Hector Retamal, File)
FILE - In this Aug. 22, 2010 file photo, Chile's President Sebastian Pinera holds up a plastic bag containing a message, from miners trapped in a collapsed mine, that reads in Spanish "We are ok in the refuge, the 33 miners" in Copiapo, Chile. Chile marks on Sunday, Aug. 5, 2012 the two year anniversary since 33 miners were trapped in the mine that collapsed and trapped them for 69 days before their rescue. (AP Photo/Hector Retamal, File)
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