asiana landing at san francisco a year and a half ago. and it's built on 747 technology and boeing builds pretty solid, pretty sound airplanes. air malaysia has 17 of them, of these 777 200 ers and they've been operating them for a long time. so, the airplane has a superb safety record. it's a little difficult for me to believe it's a mechanical problem. >> looking to the past sometimes can give us clues to the future. let's talk about some of the other incidents that we've seen and some of the theories that have risen out of them. let's look at tw 800, paris-pound flight exploded mid-air off the coast of long island 1996, serveral theories came about and all of them were disproven. >> that accident occurred