Seeking clues about mindset of Andreas Lubitz, Germanwings co-pilot

(CNN) They were high school exchange students, heading home after a week in Spain. Opera singers fresh off a show in Barcelona. An architect from Colombia who'd gone across the Atlantic to work in Africa. An Australian nurse on vacation with her son.

The Germanwings co-pilot seemed to have crashed the plane deliberately, killing 150 people on board. The co-pilot wouldn't let the captain inside the cabin, with the “intension to destroy” the jet, the French prosecutor said at 

The third American victim who died in the Germanwings plane crash has been identified as Robert Oliver Calvo. Oliver, 37, was an American citizen born in Barcelona, Spain. Germanwings Co-Pilot Appeared to Want to 'Destroy the Plane': Prosecutor.

The third American victim who died in the Germanwings plane crash has been identified as Robert Oliver Calvo. Oliver, 37, was an American citizen born in Barcelona, Spain. Germanwings Co-Pilot Appeared to Want to 'Destroy the Plane': Prosecutor.

The Germanwings co-pilot seemed to have crashed the plane deliberately, killing 150 people on board. The co-pilot wouldn't let the captain inside the cabin, with the “intension to destroy” the jet, the French prosecutor said at