used all the time and the controllers know that the pilots know and vice versa. >> so technically, the co-pilot should have reread ho chi minh city, 120.9. >> yes, but they've probably done this hundreds of times and it just goes -- >> so as far as you're concerned, not much to glean from this? >> no, and we seem to be focusing on the repeating of the altitude a bunch of times. the way i look at it, if i wanted a higher altitude to go into that air space, the way i coax a controller that i want a higher altitude is to confirm i'm still at the same altitude. >> mary, you agree, nothing to glean from this transcript? >> except we keep focusing on the co-pilot said all right,