An awful tragedy for sure. And I’m sorry to bring up trump ( I’m not even American ) but from the two messages from his TS page, it would seem like the first was written by the grown ups, and the second ( y’know, having to blame somebody ) was his own work. Clutz.

Tragic.

I think the answer to this would be to have seperate airspace for civilian and military. Especially in such a major city like Washington DC. Though not sure if it would be totally possible, considering the White House and Pentagon are right there.