"An arm of a victim is seen in the debris of a collapsed building after an earthquake in Dujiangyan, Sichuan province." - REUTERSA telling picture from the devastation in China. Notice the hollow concrete block. Their is no reinforing steel bar. The core is open and clean. There appears to be one thin wire on the upper right. That is no way to build in a seismic zone. That missing rebar probably ended that life.