I had no idea that we were planning a missile radar site in Boston. What missiles will be tied in with that? Sea-based defenses? Airborne defenders?
And no, I have no idea what the difference is between launch platforms and ground based interceptors.
Claims that such missile defense our pointless because enemies could detonate them in merchant ships in our ports or put them on trains miss the point that without our missile defenses, simple ballistic missiles will of course be the delivery system used. You shoot at and it will likely hit somewhere in your target country. And with nukes, you can miss by a lot. And any civilian target will do.Further, we have a Navy and intelligence agencies to combat the other methods of getting bombs to our shores. No single defense is enough.
Which is why the best defense is to eliminate regimes that want to kill us and will explore every possible means of getting a nuke into one of our cities. Playing defense--even missile defense--is the last defense and not the first defense.