conducting side-scan sonar searches with autonomous vehicles to locate the debris. so it can be a very long search effort. >> very long search effort. you know two years to find air france flight 447 and had better information than we do now. so what is the best strategy to find this malaysian airliner and to give answers to the families of the missing? here with me again is colleen keller and jeffrey thomas, les abin. colleen, you were first. you were instrumental in finding adventure air france 44, and you did. tell me what you would do here at this particular juncture. >> well, what we should be doing, don, what we're doing now is trying to keep track of all the different areas where the aircraft could potentially have gone down. we still have possibilities that it could be farther north, it could have crashed farther south. you know, we keep hunting around in these different areas as new