On Thursday, it was determined that the co-pilot of the Germanwings jet barricaded himself in the cockpit and intentionally rammed the plane full speed into the French Alps, ignoring the captain’s frantic pounding on the door and the screams of terror from passengers, a prosecutor said Thursday.
In a split second, all 150 people aboard the plane were dead.

This photo provided by the Gendarmerie Nationale shows rescue workers investigating on the crash site near Seyne-les-Alpes, French Alps, Wednesday, March 25, 2015. French investigators cracked open the badly damaged black box of the Germanwings plane on Wednesday and sealed off the rugged Alpine crash site where 150 people died when their plane on a flight from Barcelona, Spain to Duesseldorf, Germany, slammed into a mountain. AP Photo/Fabrice Balsamo, Gendarmerie Nationale