Volunteer rescue worker Pedro Serrano, 29, a doctor, was one of the rescuers who managed to crawl into the crevices of the tottering pile of rubble that had been Escuela Enrique Rebsamen.
With barely room to move, in an intensely claustrophobic situation, Serrano managed to make it into a collapsed classroom — only to find all of its occupants dead.
"We saw some chairs and wooden tables," he said. "The next thing we saw was a leg, and then we started to move rubble and we found a girl and two adults."
