True geeks know that Sentinels, no matter which cartoon, comic, or movie they appear in, are all-in-all pretty damn evil. The ones in the X-Men are probably the most recognizable. Gigantic and menacing, sentinels were made to hunter and gather mutants. Thankfully there's nothing like this now, thought we here Arizona politicians are looking to make the technology a reality.
As Seen In: X-Men: The Last Stand (2006)