6 dead, 14 pulled out alive in Philadelphia building collapse

Equipped with search cameras, microphones and motion detectors, and bathed in harsh LED lights that illuminated the darkness, rescue workers combed through piles of bricks and rubble early Thursday, listening for the faint tap-tap-tapping of life buried in the ruins of a collapsed building. A day earlier, the side of a building under demolition had given way and toppled onto a Salvation Army thrift store next door.