On my dvd I explained one of the fears that people have about flying is anxiety of the unknown. Less people fit into this category then normal , but still it is a factor in some people's anxiety about flying. This is common among people who never flew before. Many times you have fearful fliers who fear flying only because they have a bad perception of flying mainly because of influence from other people such as their friends, & family. Its only after they take their first flight do these people start to shape they opinion about flying. In most cases they actually like it. Similary, people who flew already sometimes have an unexplained event on a previous flight that make them full of anxiety,& afraid to fly. But, if they have a good understanding of what happened on that flight, or learned how to anticipate it, I guarantee that they would'nt  have been afraid. My point is that outside events, & people sometimes give bad influence to increase your anxiety.