A mock 'killer robot' is pictured in central London on April 23, 2013 during the launching of the Campaign to Stop 'Killer Robots,' which calls for the ban of lethal robot weapons that would be able to select and attack targets without any human intervention. The Campaign to Stop Killer Robots calls for a pre-emptive and comprehensive ban on the development, production, and use of fully autonomous weapons. AFP PHOTO/CARL COURT        (Photo credit should read CARL COURT/AFP/Getty Images)