Whatever Happened to the First Law of Robotics?

The folks at iRobot not only make the Roomba, which will robotically vacuum your floors and drive your dog insane, but also they make military iRobots, which will chase down and, er, vacuum up terrorists, enemy combatants, and other assorted malefactors. I, for one, would not like to see the bad boy pictured on the right chasing me down some hallway or alley. Not every iRobot, however, packs heat, and many perform certain defensive military missions such as handling and disabling IEDs, detectin
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