we look at precedent, simply precedent. yes, pilots have fallen asleep. both crew members. however, these aircraft are highly automated. they fundamentally lie to themselves. along the navigation waypoint route and can even land themselves at the host airport without any pilot interaction. the risk of death to the passengers from pilots napping has not come to fruition. there has been no recorded event that passengers have been killed as a result of crews falling asleep. what if the pilot or co-pilot turns on them. >> there have been situations like that. in that particular situation, the crew prevailed. if we weigh the other risk that's known, thousands of people have been killed as a