Free Beacon is a legitimate source. See, they quote actual people, not other blogs. Here's the "nothing to suggest they didn't have ammunition".
http://www.defense.g...anscriptID=5111.
That's not exactly a debunking now is it. He didn't flat out say "They had ammunition".
The other report of "warning shots" that DC Tom linked to said it wasn't clear where the shots came from or who fired them. So there's that to.
I'm moving on because it really doesn't matter at this point. If true the left doesn't care one bit and will just use whatever excuse they can to justify why they didn't. If not true, apparently it didn't save them anyway. Sad.