Other people mentioned in another thread that it's probably ammo of the security team exploding in fire. They probably had between them a couple thousand rounds.
Very Possible — But I find it interesting the video has now been yanked.
http://www.flickr.com/photos/digitalglobe-imagery/4515204703/sizes/l/
Look at large size..
I see the info on the runway was reported (9/27) wrong and it is marked. It looks like a 26....
Also for a air base, that tarmac has some big planes. I’d say this base has some up to date nav aids that may be not well known.