You do realize that the agreement that was just signed simply ties the current and future European systems (Dutch, German, and Spanish SM-3; German-US-Italian MEADS; French SAMP/T; and US SM-3s in Eastern Europe) to the current and future US sensor network? And you realize that the current network already ties in mobile THAAD batteries, SM-3 equipped AEGIS Cruisers and Destroyers (US and Japanese), and the GBI bases in Alaska and California?
And that the whole thing is in it's simplest form a giant systems integration problem, one similar to what the US has already done?