They have ground based systems, also Obama basically says he is against the defense shield (mainly because Russia does not like it and we best do what they say) but I am sceptical as to if he acutally is chaning anything about it. Obama does not always say and do the same things nor does he think about the consiquences of the things he sometimes does cary out. For example lets shut down Guantamno bay, great but where do we put the people? Our gov over the last 10+years likes to say and do two different things.

As for the controlls I always figured it would be wireless and could be intigrated onto the gun somehow so you can drive from your gun and be able to shoot.