DougR R you just trying to stir things up or do you believe what you are saying?

There is NO WAY, this thing is going to be cost effective. Even if they build and man enough of these things to give real protection, the bad guys will just find another way to deliver their bombs. The Russians, Chinese, French, and English can deliver their weapons with cruise missiles. The others can use boats or commercial planes. This plan is nothing but pork barrelling.

That being said, if you are going to spend billions on R&D Isn't it better to spend it on technologies which reduce internation tensions rather than increase them?