Tremendously upsetting.
That's one of my common local flying routes, and while I don't know the people in question personally, I have a friend who helps out with that cadet group who've just lost two instructors and two girls on air experience flights. Just horrible.
Before the aircraft were identified I spent the day fielding phone calls from frightened relatives afraid (in spite of the fact it was a weekday and I was in work) that it might be me.
