Revealed! Germanwings pilot was locked out of cockpit before fatal crash

The plane's black box

Shocking new details on the doomed Germanwings flight has been revealed..According to the Black box retrieved, one pilot was locked out of the cabin and could be heard banging on the cabin door ..It's still a mystery why the plane crashed at it was mid-flight in an area with clear skies..But the cockpit voice rcorder shows,just one of the two pilots was in the cockpit when it happened..
Here is how the NewYork Times reports it

A senior military official involved in the investigation described “very smooth, very cool” conversation between the pilots during the early part of the flight from Barcelona, Spain, to Düsseldorf, Germany. Then the audio indicated that one of the pilots left the cockpit and could not re-enter.
“The guy outside is knocking lightly on the door, and there is no answer,” the investigator said. “And then he hits the door stronger, and no answer. There is never an answer.”

He said, “You can hear he is trying to smash the door down.”
While the audio seemed to give some insight into the circumstances leading to the Germanwings crash on Tuesday morning, it also left many questions unanswered.“We don’t know yet the reason why one of the guys went out,”.But what is sure is that at the very end of the flight, the other pilot is alone and does not open the door.”