(CNN) — The sounds recorded on one of the “black boxes” recovered from downed Germanwings Flight 9525 firms up investigators' theory that the co-pilot locked the captain out of the cockpit and then crashed the plane.
(CNN) — The sounds recorded on one of the “black boxes” recovered from downed Germanwings Flight 9525 firms up investigators' theory that the co-pilot locked the captain out of the cockpit and then crashed the plane.