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You can now buy a flame-throwing robot dog for under $10,000
(arstechnica.com)
This is a most excellent place for technology news and articles.
Boston Dynamics has made multiple robots for DARPA. If they make a really great platform, I expect they're probably gonna be weaponized at some point. Maybe not by them, but...
I remember a buddy of mine who was working on an autonomous, self-mapping rover research project at his university on a DARPA project. He was just working on the navigation side, part of a larger project. He was telling me how he had a "huh" moment when they got the first control unit and it had a big red button on it labelled "weapon".