the black boxes. i have no doubt about that. i'm not saying it is easy. that's a fairly tricky topographic area, on the north side of an undersea plateau that is about two miles high off the sea floor and the north side might have canyons, gullies and all sorts of stuff. it won't be easy but can still help on a survey. last thing you want are boulder and rocks scattered around on the sea floor. if silt is covering the sea floor it may help the sonar source. >> if you are just joining us a significant press conference from angus houston. coming as close as possible to saying they have, with a lot of confidence very close to finding this aircraft underneath the water. they said they will not confirm anything until they have a visual on wreckage. they obviously want to continue to search for debris, as well,