a doctor at san francisco general hospital told us last hour six people there remain in critical condition including a child. officials say they're seeing severe injuries like head trauma and paralysis. the faa said this afternoon some flights destined for san francisco could be delayed up to nine hours today. dan simon joins us live from the airport. what is the latest there. dan. >> reporter: hi, fredericka. it's been a little more than 24 hours since this crash happened and the investigation appears to be well under way. investigators have been out to that scene trying to figure out any type of clue to determine what may have heaped here. we know, as you reported, the flight data record have been sent to washington and appear to be in good shape. hopefully data is currently being extracted from the recorders. at this point, nothing has been ruled out including pilot error. we know the ceo of the airlines