joining us is dr. campbell, a practicing cardiologist and assistant professor of medicine at the university of north carolina. so you would be able -- the idea is you would be able to sort of treat people while they sleep for some of the things that scare them the most. >> exactly. one of the interesting things that came from the study is the fact that we can desensitize folks to a fear or a phobia that provokes all this anxiety while you sleep. traditionally you have a therapist and you slowly desensitize during waking hours. now this research may lead us to new therapies that are less traumatic for the patient. jon: fear of flying, for instance, how would you be able to, while they're sleeping -- i mean, you know, somehow recreate the experience of being on an airplane or boarding an airplane or whatever triggers the fear? >> there are triggers that are associated with flying. maybe a certain smell, maybe a certain sound or noise. we can use the triggers while