I came down to Las Vegas Convention Center this Wednesday, September 26, 2018. There are big drones shooting spider-web-like net to capture the intruder in the sky. I found many advanced technology as facial recognition systems. I especially enjoyed a demo at NEC, which can identify one's motion and spell it out on the screen. There was a person drinking a water from the bottle, then the system recognized him as "drinking" and it says "drinking" at the screen just above him.
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