[AS37 Norm Edwards]

Obviously their acrophobia gene isn't active! People that do this type of job just don't have fear most would have and studies have shown that there may be a connection with one of our gene types but this is negated by studies that show that the intensity of the task outweighs the height factor, thus it isn't a problem for them... remember the saying "The only thing we have to fear is fear itself"! Kudos to these guys!