Recorded details of Sept 11 NY attacks made public:
The audio tapes, transcripts of emergency workers' radio dispatches and oral histories provided by rescuers after the attacks recount the harrowing and grim moments when thousands of people were trapped and died in the flames and debris of the twin towers.
Firefighter Maureen McArdle-Schulman described a "constant" stream of bodies falling from the towers.
"I felt like I was intruding on a sacrament," she said. "They were choosing to die, and I was watching them and shouldn't have been, so me and another guy turned away and looked at the wall and we could still hear them hit."