In this still image taken from a video released by the government of Chile on Oct. 10, 2010, workers lower steel pipes to encase part of the escape shaft as efforts continue to free the 33 trapped miners at the San Jose mine near Copiapo, Chile, Sunday, Oct. 10, 2010. A drilling rig punched through to the collapsed mine where the miners have been trapped since Aug. 5. (AP Photo/Government of Chile)