Geremanwings co-pilot 'Delibrately' crashed plane which killed 150 .

      The co-pilot f the Germanwings aircraft barricaded himself in the cockpit and "intentionally" rammed the pane full speed into the French Alps, Persecutor said. Marseille persecutor Brice Robin, citing information from the "black box" voice recorder, said the co-pilot was alone in cockpit. Andreas Lubitz 28, locked the cockpit door when the other pilot stepped out to use the toilet. Lubitz, a German, delibrately started the descent, according to the associated press. The captain made several calls on the intercom system, but the co-pilot did not respond, and evidently de-activated the plane's flight monitoring system.  The co-pilot did not respond to air traffic controller and did not issue or made distress signal. It may recall that Geranwings airbus with 150 passengerson board crashed in French Alps, killing all passengers onboard.