And this is the point it was as far as I'm aware the only air show over land. For how many years had it been going and people had been gathering in huge crowds by the side of the road. Looking back as you say the decision to allow the show over a busy road is madness. This is a truly tragic incident and my thoughts go out to the families of those who lost their lives.
Fairford is another over land as someone else has referred to as is Farnborough. Also, the Red Arrows regularly perform at events over land. As tragic as this was, wasn't it the first aircrash at an airshow that involved spectator fatalities since Farnborough in 1952. As tragic as the events were, considering what's involved, that isn't a bad safety record.