if they were to self-report, they could be fired or lose their career or have their license revoked permanently. so many questions as a result of this and so many families suffering tonight, also as a result. erin? >> will ripley thank you very much. i want to bring in our aviation correspondent david soucie and neuropsychiatrist dr. lawrence tucker. dr. tucker let me begin with you. your area of expertise is at the heart of this. lubitz's doctor says that his vision problems were psychosomatic. in other words, to oversimplify it it was in his head. it was a psychological problem as opposed to a physical one. how is that possible? >> well when you have an anxiety disorder like it sounds he had, ptsd multiple traumas, he was very anxious. so anxiety and depression can