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Area about 700 miles from where the plane lost contact with air traffic controllers early sunday morning. that plane disappeared shortly after the pilot asked to change the route. listen. >> well, it sometimes is, but it's the radar blip the transponder onboard the aircraft that's giving information back to the air traffic controllers. it'll tell the direction and the altitude of the aircraft. in this case he was asking for a higher altitude. why, we don't know. that's a big question. trace: i want to bring this a former ntsb investigator and the author of "air safety investigators." doctor, f...

Least not be seen as an object that merits attention. so it is theoretically possible but at some point they're going to pick it upcoming in and going out. so that's the key area wheres there's some problem with that particular idea. >> and then, of course, you have the real confounding question dill that it is believed to have returned to normal flight altitude which have undone any hiding that it had done before that. so let me end with this, colonel. do you believe that they scrambled jets? do you believe they did that? >> well, it would not be what i would call a scramble in the traditiona...

Radar blip was reported, is to the a true scramble and is a complete waste of resources from a military standpoint. >> the military doesn't have a lot of motivation to lie about that because it's not something that makes them look good necessarily. so you put some credibility in that report. colonel, thank you very much. appreciate the perspective this morning. helpful. >> you bet, chris. my pleasure. thanks for having me. >> kate? coming up, the latest on a bus and truck collision that killed several high school students in california. we're going to talk to a police official on the scene a...

Done so much of this. miles is a pilot as well. you know that this is probably the biggest question on people's minds in terms of leading home to a conspiracy is that this is the age where everybody knows everything and here you got diago garcia, so capable. it's in the area and didn't see this plane. what does that tell us? >> well, for me it tells me people get so complacent in their jobs and we saw this even before september 11, 2001. the airlines and the security companies were warned that something was afoot. people get so complacent day in and day out and we know they didn't see or didn'...

To interfere. >> until you get a camera on it, you don't know what that object is. you need to be, what, a few feet away to get a camera on something? >> that's correct. i equate it to maybe a radar blip. we would need to get within a few dozen feet to see something clearly enough to identify it. >> the assets on this, the blue fin submersible sub, how effective will these be? >> the ping locater may not be very effective. it may be 2 miles away before you even start. so you'd have to bo right on top of it to find it. and of course, it has a limited life. >> and a submersible, you need a much ...