This episode of Visibility 9-11 features an interview with former air traffic controller Robin Hordon.   Mr. Hordon provides a valuable insight into the inner workings of Air Traffic Control Towers around the country including qualifications and training for air traffic controllers, Hijacking Protocol, In Flight Emergency Protocol and the difference between the two, and the way these protocols were manipulated in the months prior to September 11th, 2001.Closing music by Cyberian.