breaking news we have been covering, australian search officials say a towed pinger locater has picked up more audio signals in the southern indian ocean and they say it could take some days to determine whether the latest sounds are from malaysian airlines flight 370. >> and now, some people are suggesting putting cameras in cockpits so authorities can see what happens at the time of an accident. >> we are descending to 3,000. >> as pilots guide commercial planes across the skies, everything that they say is recorded. but unlike other modes of transportation, we with can't see what is happening at the controls. cameras have shed light on accidents, like when this bus driver was caught on surveillance camera text thing before hitting an suv, cameras are watching train ku ining con