The US Is Testing Its New Deadliest Submarine

It is no secret that all marine waters are patrolling by unnoticed hunters that rarely surface. These dangerous submarines are sneaking up silently to hit enemy warships in the most unexpected moment. And cover under the waters, staying completely undiscovered by hostile anti-submarine ships. How could they achieve such sophisticated power, and what features do these most dangerous subs have? Stay until the end of this video to find out.