planes and directing aircraft for takeoff and gait approach. investigators say, it is not so unusual for a ground worker to be around planes and secured areas. >> they don't necessarily use a key. so there are switches that they use to start the aircraft. so if the person has a basic understanding from what i understand, he was support personnel. they probably do have at least a basic understanding on how to start the aircraft. arthel: for more on this our next guest is an aviation analyst, mike boyd. present avoid group international. nice to have you here, mike for this. you have a ground service agent in an aircraft. they said he had some sort of a