Maybe I ought to clarify why this is bad.
Rictor might very well be right, that it's all a bunch of hooey. I honestly hope it is.
Yes, in thought being able to defend against a missle strike is a good thing, as the only current defense to all-out nuclear conflict is deterrence. Great policy. Yeah. As long as you're fighting an enemy who actually gives a damn about surviving.
Think about this a moment, assuming the system actually works. I see two BAD things coming out of this:
1. Iran. If this current administration gets re-elected (Bush and company), Georgie Porgie's next target will be Iran. If the Iranians proceed with a nuke program, this administration would be just stupid enough to strongarm them. "We fear not your weapons which you probably haven't built anyway". Likewise for North Korea. Think about the physical, financial, and emotional damage of the 9/11 attacks over here. Compared to a 5 megaton detonation over a city. Hell, detonated in near space (EMP burst), the 9/11 attacks weren't diddly ****. We just might finally piss someone off enough to fire first.
(Qualifier: I have no issues with Iran at all, and I think giving them a hard time about things is extremely ****ed up.)
I'm also of the opinion that we are greatly underestimating the Russian response. Greatly.
2. If this defense system is even 95% efficient, it just might 'spook' one of the other members of the nuclear family into firing first under the principle that if they don't launch now, they'll never have an opportunity.
This system, if it works, represents a major shift in the balance of nuclear powers.
Maybe I'm hyping it, but this is also how WWIII started in Whitley Strieber's "War Day". 25 years later than it took place in the book, but damned near the same.