have been heard. they have been searching where the pings were heard and now say the pings are believed to no longer have come from the so-called black boxes. let s talk to former ntsb managing director and tom fuentes, former fbi assistant director. it s pretty shock iing, when yo think about it, early on, everybody talking about the four pi pings coming from the black box, voices saying, not so fast. they weren t the same megahertz or ping boxes supposed to deliver. they said, well, maybe the ocean changed that a little bit. they were pretty insistent those were the pings for the black boxes. they were the only thing they had. there were questions phrased, the wrong frequency and even distribution where the pings were heard was questionable. they had nothing else.