I saw a report that said the range from Mandalay Bay to

[MineralMan]

7. A .223 round is still deadly well beyond that distance.

But, at 400 yards, there's no aiming at individuals with any expectation of success from a typical AR-15 design. The crowd, however, is an easy target at that range, so he was probably just aiming at the crowd in general and at different parts of it. If, as is reported, he was using full auto fire, targeting individuals was never the goal. It's random mayhem, and that was what was intended, I'm sure.

I'm still trying to wrap my head around someone shooting random people in a crowd like that. Something is broken in that man's head, but I don't know what it is. This is, for me, the very scariest kind of mass violence, since it has no reason in it at all. It is the kind of thing that makes me feel very vulnerable, despite the long odds of ever being in that situation.