Lufthansa admits it was aware of Germanwings co-pilot's depression

      |Top executives from Lufthansa are visiting the site where 150 passengers died in last week's Germanwings Flight 9525 crash. They are not talking about how the airline knew six years ago that Andreas Lubitz, the co-pilot who crashed the plane, had suffered severe depression. Allen Pizzey reports from Montabaur, Germany.