You think DARPA will ever give Asimov's rules for robots a glance? They are this:
First Law – A robot may not injure a human being or, through inaction, allow a human being to come to harm.
Second Law – A robot must obey the orders given it by human beings except where such orders would conflict with the First Law.
Third Law – A robot must protect its own existence as long as such protection does not conflict with the First or Second Laws.
from Wiki