freezing fog and the crew would actually only have seconds to get their oxygen masks on or risk disorientation, blurred vision and complete incapacitating problems. the air france flight that crashed over south america, some equipment malfunction but the pilots responded improperly and that s what brought the plane down. there are many, many possibilities out there and until we have more evidence, they are all in play. yeah, good point. tom foreman, thanks very much sf let s get a closer look now with mark wise. mark, you ve actually flown a 777, right? absolutely, wolf. tell us, what does your gut tell you? what does it look like in mechanical error, terrorism? pilot error?