Here's the skinny from Fox News.
Not that it matters to me, but it is being noted that the shooter was definitely NOT a Tea Party conservative right winger. So that's out of the way.
He's also dead, which is pretty helpful unless you are really wanting some answers. I prefer crazy shooty people dead. The fact that he is dead is because the Pentagon, while being a "Gun Free Zone," is not completely a gun free zone; it's very well protected by guys and gals with guns.
Not that I agree with their policy to disarm everyone: you can't even bring pepper spray in, because mere citizens can't be trusted to not take control over the entire "Reservation" with that deadly 4oz. bottle of Mace. If you get abducted in the parking lot while on your way to the entrance, well, tough shit. Safety first!
I did hear on the news this morning that there was a ton of rounds fired. From what the reporter said - take that for what it's worth - the FBI was up all night counting shell casings. They may have even recruited the help of two boats full of Chinese immigrants to help count them all. Allegedly, the gunman was carrying two 9mm handguns, and had a bunch of loaded magazines (yes, the reporter called them magazines. Cool huh? Now, if we could just get them to call them "mags," or call shotguns "shotties." That would really be cool!) with more magazines in his car.
That's all I know for now.
Update: Remember the days when I was a gun geek? Yeah, I still am - the cop in the picture on the front page of the Fox News article is carrying a LWRC PSD 5.56mm rifle with an EOTech optic, Surefire M900 series weapon light, and Magpul magazine. Oh yeah, mag - pardon me!