[rokkhound]

Here's an idea that should be expounded. We have horizontal drilling techniques.....pop a hole in all their tunnels, pump some gas or oil in there and light them up! I've thought this from the beginning........glad someone else had a similar idea.

[Mind-numbed Robot]

If we could get close enough to those caves to setup and operate a drilling rig long enough to do as you suggest then we can take them out in other ways even sooner.