 And for the shooter to have carried this out, it is, as we've talked about in other terror contexts, very easy to get a weapon in this country. You just laid out for a lone actor. It is very hard to detect the intent of someone like this to carry this out. What do we need to know about the threat environment for anyone going to a mass gathering, whether it is a political rally, a concert, anything outdoors? Should Americans feel safe this morning?