We have leveled the remaining structures that were found on the surface, and we have closed all the caves that we would intend not to be occupied.

There's a lot of dust in the air right now, ... With that dust in the air, it's very hard to tell exactly what's going on.

We are responsive to the opposition groups whom we are supporting in that effort right now, ... I think it would be fair to say that if the opposition groups were to ask us not to bomb a specific facility or location so they can continue their discussions, we'll certainly honor that.

and in some cases, they appear to be in active retreat.

A lot of times we don't even know the caves are there, and we find out caves are on BLM land by the spelunking groups.

We found bits and pieces on the surface, and knew we'd found something -- we just didn't know what it was. We had a sense there were a couple of sites that could produce significant scientific information.