puff of smoke, as they put it and stuff started falling out of the sky. and it happened -- as tom was mentioning, this happened in the afternoon 1 p.m. local time in that area. what does that say to you knowing these eyewitnesses heard this huge, loud boom with a puff of smoke? >> well, that's very consistent with an uncontained engine failure. bear in mind this plane is still in the act of climbing and still over heavily populated areas. so there's a lot of potential for people to see this and be impacted by it if they're underneath with all this debris coming down. imagine the amount of energy involved with these huge engines. each engine is quite large and it's got enough energy that it can propel this huge aircraft up