@JohnRobb: “Air dropped micro-UAV swarm maneuvering and encircling target…” – Twitter

“Air dropped micro-UAV swarm maneuvering and encircling target. Sound of swarm is eerie cool (2:20) https://t.co/J4nTYnVYbC”

From: John Robb on Twitter: “Air dropped micro-UAV swarm maneuvering and encircling target. Sound of swarm is eerie cool (2:20) https://t.co/J4nTYnVYbC”