Old Age or 9/11? Researchers Look for Heart, Kidney Diseases Among Sept. 11 Survivors

As the first of the twin towers fell, NYPD officer Ada Resnick was enveloped in the massive cloud of debris that shrouded Lower Manhattan, the suffocating mix searing her eyes and lungs.

She thought she might die but emerged alive and spent a long day guiding survivors of the Sept. 11 terrorist attacks toward safety.

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