So we have an actual plot, by a hardened criminal, admitted without coercion by one of the criminal's "friends". It might be noted that Adolph was on the Weld County Most Wanted list and that Weld County officials thought him capable of killing without compunction...
So we're not talking about the guys thinking about attacking Fort Dix, who didn't even have weapons, or the guys from Miami who thought the right shoes were important to being terrorists. These guys had high-powered sniper rifles, scopes, and fake IDs.
Phoenix has much more, please go read the whole thing.
More on this topic here.