[gregebowman]

Even though it's probably 25 years or so since I've read Robert A. Heinlein's The Moon Is A Harsh Mistress, there was one thing in that book that always stuck in my mind. IIRC, the moon population was rebelling and trying to become an indepent state. In one scene, the moon miners, insteading of sending moon rocks in a controlled descent to earth, rigged the machinery so that they were using it as a weapon and hitting whatever targets they wanted to. I've always wondered that if we could ever get a moon colony going, if such a weapon could be made and we could take shots at whoever we wanted to. Imaging sending a big rock at Tehran? Or Syria? Or maybe once China makes whatever move they have in mind?