I don't think we'd use the "Iron Dome" persay.
We've absolutely kept up with our ability to Glow in terms of information warfare, so it's not we've remained defenseless; but think of all those cold war weapon platforms we built out for nothing, obviously having good inteleigence is the first in countering anything.
If a retaliation system is best used by letting people know about it, and counter measure system is best when it's capabilities are never explicitly known.
The issue with this is it makes bluffing about having such a system a weird tactic.
I hope I don't find out first hand, or if I do, I find out the good news about where my tax money went... Although our leaders have been exceptional vultures as of recent...