(I can't see it passing though, in the current mood; especially how useful the future ability to rain Death From Above on recalcitrant oil-rich states would be to stability and the preservation of the non-negotiable American lifestyle. (For examples of the utility of space-based weapons, see Ken MacLeod, The Star Fraction.))
Boeing do it better:
Raytheon's Exoatmospheric Kill Vehicle:
http://www.raytheon.com/es/esproducts/dssekv/dssekv.htm
(Just imagine the cataracts the Fred Hollows Foundation could fix with this baby!)
Well, there goes sattelite TV... :-)