more signals. now they head underwater to locate possible wreckage. brian considering that no wreckage has been confirmed, it's a major achievement to have this kind of strong lead. >> it is, errol and we know this, because my team and i got access to the manufacturer of the pinger locater. that company is called phoenix international, it's head quartered here near washington, d.c., we got access to the facility a couple of weeks a ago, they showed us a model and showed us what it can do. it's extraordinary, this signal detection, if indeed it is the black box from mh-370, they told us without a confirmed piece of wreckage, it's difficult for the pinger to find something. what it's designed to do, once you found a piece of wreckage,