Just the same concept, melchett and doesn't have to be 20 or 30, it could be 2 or 3 thousand. These aircraft can be made very cheaply -a fraction of the cost of the missile needed to destroy one. Racedo I agree with your point but don't forget we may also have to get used to the idea of them being used offensively en masse against us!
Beagle you're right to highlight the "unmanned manning" irony but that's why they now designate them "remotely piloted"