>> yeah. hard to see. >> roger takes us through a manual scenario. something the german pilot did not do? >> it is uncomfortable? >> it is. >> in fact. can we just get out of this. there is just no need to take us through that. >> even in a simulator, something we asked him to do for the purposes of this story, this pilot cannot stand it. >> does it exceed pilot instinct? is it human instinct to pull up? >> yes. i'm thinking about the safety of my passengers and my crew and that airp and that is what i do as a pilot. >> is that why this incident has to disturbed the people of your profession? >> it is unthinkable that someone would take a plane and take it into the ground. it is unthinkable. >> unthinkable. and air french investigators believe that the first officer