store. i heard a great big crack. claude davis across the street watching from his apartment. i looked and seen the building crumble. oh, it was painful. oh, my goodness, and i thought about all of the people in there that couldn t get out of there and i screamed and hollered. reporter: those people who couldn t get out include those who died and at least a dozen customers. jordan mclaughlan ran in to help. people inside the building, you heard them screaming. another rescuers, standing on the rubble. helped pull four people out. we were on top of the roof, pulling them out. when we got there, all you could hear is help and maybe see a hand or something through the rubble. reporter: philadelphia mayor michael nutter says they don t know how many people in the thrift store at the time. to prevent any further collapse,