someone tried to turn all those systems off at once or the pilot was unable to communicate, kept from communicating or there was a mechanical failure of some kind that took all those systems out at one time. >> then, minutes after the transponder stops, the 777 makes an unexpected turn heading west and way off course. >> that the plane turned immediately after the transponder went off is completely inexplicable and very worrisome. >> peter goelz is a former managing director of the ntsb. >> we don't know whether this was done voluntarily, whether it was done under duress. we simply have no idea. >> no idea what really happened, but goelz sees a red flag. >> it was completely out of the ordinary that there was no distress call. that the turn takes place and there's absolute silence, it means that somebody on that