`` So all these safety nets ... have not worked in this case , '' Lufthansa CEO tells CNN . The airline said it has been working with the U.S. Federal Aviation Administration to ensure that passengers are properly screened before they board a flight.
`` So all these safety nets ... have not worked in this case , '' Lufthansa CEO tells CNN . There 's clear indication co-pilot `` did n't want the captain to return , '' Carsten Spohr says .