kind of approach and you've never done it before, that in itself can become a distraction. >> with zero visibility in the fog, pilots are having trouble keeping track of the airbus' horizontal position. the plane ends up almost a mile left of where they should be on approach to runway 5. at 7:19, landing gear is down and locked, but the airbus is descending way too fast at 3300 feet a minute. passengers are completely unaware of the serious problems in the cockpit. >> i did not notice something strange. it was a quiet, normal flight. >> just as passengers are asked to make sure their seat belts are fastened, a low altitude sensor rings out in the cockpit. >> 200. >> a second later, a monstrous crash into a mountaintop. coming up -- a passenger is terrified he'll die in the wreckage. >> i thought to myself, you have to find a way out of the plane.