there recess metallic banging more than three times which paris match suggests may have been the captain trying to force his way back into the cockpit after being locked out by the co-pilot. toward the end there's said to be a heavy shake stronger than the others. apparently as part of the plane scrapes the mountain. the screams intensify, and then nothing. tonight lufthansa airlines is acknowledgeing for the first time that it knew the co-pilot andreas lubitz had a history of psychological problems before he deliberately crashed the jet. the parent company of germanwings releasing a statement saying lubitz informed their pilot training school in 20009 that he had a previous episode of severe depression. the airline says lubitz provided that information in the medical documents he submitted before resuming his flight training. after taking a break for several months. lufthansa revealed last week that lubitz was cleared to fly after that interruption. >> translator: he continued his