let's bring in a former federal prosecutor and a commercial pilot himself. fred welcome back. also i have with me an faa designated senior aviation medical examiner. so welcome to both of you. fred i promise, i'm coming to you but, first, doctor, i have a lot for you. and to be crystal clear for everyone watching all of these different bits and pieces of his medical history, it's painting a mosaic but we don't know exactly what was happening with him right before he took this plane down. first, begin with the vision problems. can you explain to me what it means when a doctor says to you nothing physical is going on to explain vision issues. it's psychosomatic? >> speaking as a physician with 40 years experience i know that a psychosomatic illness has to