And now a month after this plane has fannish ivanished, it is c and our sources say investigators are confident that the pilot, not the copilot, but the pilot was the last person to speak to air traffic controllers. That was the voice heard saying good night. For weeks we were told it was the copilot. As for the search itself we now have a new possible signal today heard by one of these sono buoys. They are floating microphones that these search teams they toss them off airplanes into the ocean below just to listen. So if youre counting along with us, this is the fifth credible ping that could be coming from the missing black boxes, the planes cockpit data or voice recorders. Lets talk about the altitude. The purported dip of some 30,000 feet this happened after the planes initial course changed, after the flight crossed malaysia and flown back out over water. Keep in mind the planes next move was the jaunt around indonesia. We might be talking not one but two maneuvers to avoid radar