Heinlein's The Moon is a Harsh Mistress has Luna launching kinetic weapons at Earth.
Indeed. They're weren't relativistic, but they still made an awfully big "bang"!
26 posted on 08/04/2013 10:42:58 AM PDT by Kip Russell
(Be wary of strong drink. It can make you shoot at tax collectors -- and miss. ---Robert A. Heinlein)