Aftershocks weaken Chile's quake-damaged buildings

A machine works in an earthquake-destoyed building in Concepcion, Chile, Saturday, March 6, 2010. An 8.8-magnitude earthquake struck central Chile last Feb. 27, causing widespread damage.(AP Photo/ Ivan Pisarenko)

March 6, 2010 1:53:25 PM PST
A father's unanswered cry for his missing son rang out Saturday from the wreckage of a fallen 15-story apartment building that has become a symbol of Chile's devastating earthquake.