turn off transponder? >> the co-pilot would acknowledge he was able to change over the frequency. who knows what he had done from there. i assume he would stay in the cockpit. the airplane was only airborne for 40 minutes at that point. >> hannah asks, why is it taking so long to get the delete files from the pilot simulator when it takes hours to track deleted texts and e-mails? >> good question. the fbi is very good at that. i would suspect they have already done it and have recovered those. they just haven't released them and that's typical for the fbi. they usually don't release anything in the ongoing criminal investigation. >> this -- i wondered about this one myself, actually. this one is for jeff. this question comes from elizabeth. elizabeth is asking, anyone consider the possibility of the pilot filing a second, a false flight plan to disguise the i.d.