so it's possible -- >> let me go back to keith wallzinger for a moment.les if you were involved in this kind of scenario and there was something catastrophic going on, would you dive down to the nearest airport as david is suggesting is a possibility here penang? >> certainly if it's a depressurization or fire in the airplane. get the plane turned toward the nearest airport on the ground and let everybody know in the process. >> let me ask you this. most people i've spoken to about it, everyone's still gripped because the mystery remains. they all say the same thing. why has nobody on the entire plane been able to make any kind of contact or communication with somebody outside it? keith wallzinger for you. >> i have no idea why anyone would not be able to communicate from the aircraft. the cellular phones don't work at high altitude. they don't work offshore. they have to be in range of a ground-based tower. there's lots of reasons why communication might not be possible. >> okay. going to take a short break. please stay with me, panel. when we come back

joining me tonight, captain keith wallzinger, a boeing triple 7 pilot on the civil aviation team forrum group and cary walsh, salvage mast we are global diving and salvage. gentlemen, great to have you with us tonight. pilot, does this narrow or increase the chances for mechanical failure? how do you see it after today's developments, the new data that brought authorities to the conclusion that this was clearly the way this flight ended? >> well, it's really no new revelation. they've been searching this area for over a week now since the satellite image was showing objects floating in the water in this vicinity. it's simply become a little bit more clarified that this is definitely the area that they believe the airport might be found. it makes it less likely, in my view, that it's mechanical or some structural problem with the aircraft because the aircraft would have flown all the way from the malaysia/vietnam border all the way to the southern indian ocean. if the structure had been compromised in any way, it would have been very difficult for the aircraft to have travelled that f