Researchers at Stony Brook University say 911 responders suffering from post traumatic stress are twice likely to suffer from respiratory diseases.
Ground Zero worker Ken George, of North Babylon, tells Newsday he suffers from "night terrors" since working at the pit and also has a chronic cough.
Stony Brook researchers now see a link between those with PTSD and persistent coughs.
Researchers think those with PTSD may have a "hyper-aroused immune system" that makes them more susceptible to respiratory illnesses.