Repeat: DNA: Michael Mosco prepares to enter the bone grinding room at the Office of Chief Medical Examiner in New York - the room is central to the examination of bone DNA from those who died on Sept. 11 .
DNA: Michael Mosco prepares to enter the bone grinding room at the Office of Chief Medical Examiner in New York - the room is central to the examination of bone DNA from those who died on Sept. 11 .