themselves and if there's loss of life usually because of suicide, not homicide. that's what we know from depression alone. if there was a personality disorder that was superimposed on top of this you have to think there was something else sort of going on here. so we just don't know and as pamela was just saying what sort of precipitated all this over the days and weeks before this event as well those are very, very important details to try and figure out what may have happened but, you know, caution and i've talked to some folks who do this sort of work. they say, look at the end of the day, there may not be a satisfactory answer. there's a real desire to say, hey, this is the cause, this is what happened. but it may not be that neat and tidy when all is said and done anderson. >> lufthansa said all pilots are examined once a year and this co-pilot was in their words, 100% flight worthy without any limitations. obviously, that is not the case. they maybe have believed he was