but since the chinese issued those photographs and announced they found those white objects or spotted them from one of their aircraft, nothing else has been heard. we've seen a lot of debris that's been spotted and ruled out. we saw ocean tankers, and things that end up in the indian ocean because of the currents. this may fall into that category. certainly they don't seem to be a focus of the search at this point. >> matthew, thanks very much. the process now centers on listening for trying to reacquire the source of those two hours and 13 minutes of pinging noises. doing that before launching a much longer effort of taking sonar pictures mile by mile of the ocean bottom. we want to give you and explanation of what's going on. we go commander william marks. commander correct me if i'm wrong it's my understanding on sunday over the course of the