How is launching Nuclear (fission?) missles at incoming ICBMs over your own cities (Moscow SDI) "good technology"? Well I meant in general, they were up there in launch vehicles, lasers, particle beams et al.Using off the shelf reliable componnents is a rational way to deal with a hard problem. Fallout is better than impact.Also this technique would work just as well defending silos in mostly uninhabited Siberia. It's cheap, would probably work, sounds better than many Western military technologies.Personally, I think nukes are the way to go. Hitting even a dumb ballistic missile has turned out be very very hard.Nukes give you a bigger radius.Add in simple avoidance techniques, dummy warheads et al, and anti missile missiles look a bit sad.Beam weapons in general have the problem that they don't get on well with the atmosphere, so a serious attack on the USA would be best done with depressed trajectories to keep in lower thicker atmosphere. These are a lot harder to do, and would mean much more expensive launch vehicles.