Hey Raoul, I agree with the general statement of your post; however, I think that NMD should still move forward. As an example consider Pakistan.

Pakistan is hanging on to control of their nation by a thread. If the government of a country like Pakistan were to fall to the extremists within their borders, the concept of a terrorist launched nuclear missile could become a very real possibility.

Even if said missile is not launched at the United States, it still poses a threat to world security and thus US security. God forbid that a European city were targeted. If you think the United States response would be chaotic. Imagine all of the nations of Europe trying to formulate a cohesive and timely response.

I agree that it is not the most likely scenario, but then a suicidal attack on civilians using airplanes as cruise missiles is also not the most likely scenario.

Like it or not, defense spending is now the number one priority of the western world. NMD should be part of that spending program.