faa controllers followed. at any time we have usually at least four sets of eyes. we have the controller. we have an assist controller. we have the pilot. the co-pilot. this is more toward commercial aviation but this is something that people have got to understand. you have to -- this is all about the human factor. >> let me let captain casey get the last word before we go. does anything need to change with how this all happens? >> we need to look into it from the human factor's perspective definitely. this is really the key issue here. it does demonstrate a certain complacency and as we know that's the enemy of safety. i don't see any great overriding patterns here. the more these things occur, you know, the more alert to them we need to be and fix them when we find them. >> all right. bob richardson, captain casey,