profile accidents. in december an airasia crashed into the sea, killing 162 on board t. cause is still under investigation. in 2009, the miracle on the hudson in new york caused by a bird strike everyone survived thanks, to expert piloting. >> this particular airbus was 23-years-old, had just been through a maintenance check on monday. in january the faa warned a rare event in which airbus computer can put the plane into an uncommanded steep descent. we don't know if that played a role in yesterday's accident but here's what's critical. >> that is so rare and, in fact there is a remedy that airbus pilots have been taught and so most accident experts i've talked to really doubt that that particular problem might have crept up this time. >> tom costello let me bring in mike ral goldfarb and ask the question i have been asking all