airplane and i turn off the transponder, the controller is going to say immediately, we've mrau lost your transponder signal and we're going to have a conversation about that. these situations are difficult to understand. the minister got help. he talked about family assistance. and also innocent until proven guilty. it's all very scripted. >> u.s. officials telling cnn that they think it's more likely that this plane will be found in the southern arc of the search area. there has been a really intensified focus off the southern coast of the australia. and really, the extreme edge of where this plane could have flown. you know, what does that tell you this morning, steven? >> well, i think they've just -- you know, you search for a plane by looking for it. and then eliminating places that it might have gone that it didn't go to. certainly, on the northern route, there's just so much