that plane cannot only complement what was found on the cockpit voice recorder but could also provide a lot more clarity as to the actual movements of the aircraft that fateful day. >> it can paint a bigger picture or fill in the blanks on exactly what andreas lubitz did do if he did deliberately pilot that plane into the mountainside? >> exactly. >> do you see any other possible explanation at this point? >> well you always have to leave, in any investigation, an open mind because you do get surprises. the worst thing that investigators could do and they are so good the french and the german at what they do is to maintain -- the worst thing they could do is just focus on the mental issue. there may be some other facts, the evidence that's been taken out of the co-pilot's apartment, reviewing that in great detail may yield yet other issues that would help clarify and help solve this mystery. >> ken maxwell, thanks for being