This is indeed terrifying… 3D printed guns. as the article says: this was predicted months ago in a TED talk on Radical Openness by Mark Goodman.Our own creativity has frightening potential for bad, and awesome potential for good. Make your choices wisely today.

The world’s first 3D-printed gun is a terrifying thing | KurzweilAI
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World’s first (partially) 3D-printed gun