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Latest updates on this topic from reliable sources.

Latest updates on this topic from reliable sources.

Arcs. so if i take out that little area there and we show how the arc went, the arc drew sort of like that. so that's where it's picked up these 15 other land-based countries way up to the north. the problem is just because they know that is now added to the potential place of where the plane may have flown to, it doesn't mean that it's necessarily easier to access because each of those countries has its air space issues. so you can't just have any plane fly over there and start looking down. you have to coordinate this on the political side. but what they do have is satellites, they can take ...

Also with us is aviation consultant scott hamilton. good to have you with us tonight. tom, i want to focus with you first. why would anyone turn off a transponder. >> there is no reason to turn it off. you would only switch to the other one. you're not going to turn it off. not unless you're forced to for some reason. no pilot will do it. >> switch to the other transponder. there has to be two above 18,000 feet. >> right. >> it are really doesn't lend itself with a rigorous maintenance schedule which of course the airlines have that two transponders would malfunction at once. >> no. they know ...

Latest updates on this topic from reliable sources.