you think they have a sound basis believing that that somebody did something? >> they have a sound basis that somebody put in the four key strokes or more to get the key strokes. the timing seems to be off. it's reasonable that somebody was keyed into the computer. >> the a cars system means the investigators have to move off the theory yesterday that this system was disabled before anything else happened. if the a cars recorded key stroke, obviously it was working. right? common sense conclusion. >> who knows if that time line is correct. >> if acars recorded the data, then it was on. if it was on when they put in the key strokes, you don't have to be an expert to know that. right? let's get to what this means. why would you do that? some pilots come from different