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Originally posted by Zaphod58
The original Bunker Busters were 155mm artillery shell casings with bombs built into them, and laser guiding packages attached. They were on a timed fuse, so that they would impact, the fuse would start to "burn" and 5 or 10 seconds later it would detonate, after having penetrated through several layers of "building" or whatever it hit. It's basically a timed fuse with some kind of heavy penetrator, most likely Depleted Uranium now, so that it can go through concrete, etc.
[edit on 12-8-2005 by Zaphod58]