TB said:

"If a defense system stops only one missile from hitting one city, it will have paid for itself a dozen times over, but I don't want to hash that out here."

Agreed if this is a terrorist attack by a group that may only have one
or two such missiles, tops, but a nation may have more and would
likely use many ICBMs to take down the US. Of course stopping at
least some of them is preferable to none, but there will never be a
totally invulnerable defense against such an attack.

Obviously I want us to have a missile defense program, I just want to
see the one we have working a lot better than it is now. An enemy is
not going to make it easy for us to hit their missiles, which is what the
DoD has been doing with the last few tests - and those were the ones
that worked at all.