The Manta Ray: Northrop Grumman Unveils New Underwater Drone
18:30
The Manta Ray: How America's Futuristic Underwater Drone will Change Warfare.
14:46
China's robot army shows WW3 would kill us all.
16:24
Why China is Terrified of US New Manta Ray Submarine
3:48
Giant underwater US drone seen from space | NewsNation Now
11:07
Why DARPA'S Manta Ray Is a Nightmare for China! World Shocked!
8:31
Inside the U.S. Navy's Cutting-Edge Drone Boat Tech
15:58
Top Secret Anti-Gravity Spy Plane - TR3b Black Manta
6:34