Oh no. What an awful thing to happen.
Anyone who is speculating on causes at this time is at best an idiot. Pipe down and keep your uninformed opinions to yourselves.
This crash will likely have some serious repercussions for Reno and air racing and air shows in general. Lets hope that no kneejerk restrictions get imposed, but that any lessons that are there to be learned get implemented.
A horrible accident and my heart goes out to all involved.