Son, this is the definition of star wars, "Efficient , working EMP fired from satellite or laser defence shield.".
Now get a job and buy a clue.
Hey generally dude read the post I said LIKE.
USA and UK has a working system to down a incoming missile with laser beam. Laser heats not blows for now. Work is going on the more powerfull laser beam which will burn the missile in few seconds to current 2/3 mins time
EMP is being tested in Nevada. Discovery has a good episode on it. Please see it if you understand.
And please these where just examples. So get out of your cave and see some futuristic developments.