Here's a demonstration of the X-47B UCAS on the USS Truman. On any other day you'd say, "okay, big deal" another weapon to add to the US Navy's suite of naval weaponry.

But what if I told you there was no one sitting in the X-47B Unmanned Combat Air System (UCAS) taking the commands from the ground signalman? That's right, here's a weapon that interprets the signalman's actions and just does what it's told to do.