Re: We've seen that already
"Oh it's very easy to predict in a land where anyone can go get a lethal weapon that there will be idiots who go out and use them on other people. What's crazy is that, knowing this, people still campaign for that idiots' right to go and do that. They're practically saying "shoot me, shoot me, I defend your right to shoot me!". Getting shot really, really sucks. Perhaps they should introduce that into school curricula?"
Except the worst massacres in American history didn't use guns!. 9/11 was box cutters and hijacked passenger jets. Oklahoma City was homemade ANFO (which can still be obtained today if you're a farmer and then renatured like these guys did), and Bath Township was legal excavation charges (again because the killer was a farmer).
"The GermanWings flight 9525 crash in the Alps 24 Mar 2015 has been attributed, ultimately, to too great a respect for medical privacy in Germany."
The one I was thinking about was Air Egypt Flight 990. It was the copilot who did it. Based on flight data, best theory was that he did it deliberately and TTBOMK he had no prior record prior to the incident. Some even speculate this was the inspiration for 9/11.