appear to be troubling, yes. what will become important is to take that same deep involved look at everyone on that plane. then you can start to put people in categories. that is the best way to do it. people in group one, not likely that they could have any involvement. then you narrow it down to people that could. they may or may not be people on the interpol list. you have to go much deeper than someone just appeared on interpol list or someone took flight training. you have to go much deeper when you look at someone's personality and say what is it about them that could have enabled them if human error is involved. what could have enabled them to carry this off? what are the triggers that could have caused them. it is more than normalcy.