ADS-B/ModeS data: Germanwings Flight 4U9525. Autopilot was manually changed from 38,000 ft (9:30:52 Zulu) to 96 ft (09:30:55 Zulu)
Crimea is illegally occupied by Russia
Once he had that cockpit door shut he could have done whatever he wanted to. Even if the military sent up fighter jets, what could they have done against a commercial jet with a deranged pilot?
German police have found documentation of recent treatment for depression. It might well have been a sudden impulse. He'd acted normally enough on the outbound flight that the Captain hadn't seen anything to cause him concern. The Captain had enough confidence in the co-pilot to fly with him and leave him alone in charge. It cost everyone their lives.
I love the smell of face-palm in the morning!
"You ain't no Muslim bruv!"