screens. >> initial investigation shows they lost communication, they made this call the last time before they went off. >> that is a half an hour before the data recorder was switched off, ten minutes after the transponder was switched off. they haven't ruled off anybody in the investigation. it is believed one of the passengers was a malaysian flight engineer. meanwhile, australia has joined the search for the missing plane which covering a huge area. flight data indicates it kept flying in the northwestern arc, to the north, the arc stretches from kazakhstan and thailand. the u.s. and other agencies are searching the sea there. and the u.s. are requesting data to 11 other countries to see if