This Katrina thing and all the SHTF scenarios got me thinking -- do I "need" a combat rifle? I've got a couple of handguns and a shotgun that's set up for shooting skeet, but no rifles. And I guess I'm just paranoid enough to where I think of stuff like this. I've been thinking about an AR-15. Am I being overly paranoid or is this something I really should invest in? Is the handgun "enough" for SHTF type stuff or even most everyday emergencies and breakins?