July 16, 2003
He backtracked until he found another stairwell, went down, and made his way back to the large room. He walked carefully through the wreckage, mindful of the slabs of concrete still precariously balanced overhead. It took him a few moments, but he found the particular object that had caught his eye. It was a sizable piece of reinforced concrete, exactly like all the others, except on one side. There it was evident that someone had been chipping at it with a small metal tool. By the placement of the gouges, he could tell that they had occurred after the collapse.