The "Wall" is likely to be some version of this technology once tested and refined. Cheap and fast.https://twitter.com/luclilyhammer/status/871775363864694785 …
Drones plus human security forces. The drones just tell them where to go.
5:43 AM - 6 Jun 2017
0 replies
0 retweets
7 likes
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.