Most of us have seen the Terminator movies about robots that go through time and mess with things (to put it nicely.)  Even the RoboCop series of movies were science fiction fantasy about robotic cops using tech to fight crime.  Well fantasy is coming closer to reality:

The Defense Advanced Research Projects Agency (DARPA) is an agency of the United States Department of Defense responsible for the development of new technologies for use by the military. DARPA has been responsible for funding the development of many technologies which have had a major effect on the world, including computer networking, as well as NLS, which was both the first hypertext system, and an important precursor to the contemporary ubiquitous graphical user interface.

In the video on page two they show you some of the robots darpa may have made

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