There are a lot of machines used my army all around the world and also have weapons not only sensors.
Sources
Should a robot decide when to kill? | The VergeX-47B | Ultimate Weapons | American Heroes Channel
Campaign to Stop Killer Robots
What about Justice?
The second main theme of WAW is Justice. Is the most abstract theme of all because of the Justice idea only affects to humans...
...and it is because is only a human problem.
More information in this document.
