It is the X47B J-UCAS. Northrop Grumman's new toy. They are testing the feasibility of carrier based unmanned fighter's. I think it's supposed to be autonomous when it's completed. At least that's what they say on the Northrop website.
I just realised that it should be based on a carrier :shock: Based on water, and if it miss the landing with all the weapons still on board, some guys will have to learn how to swim quickly! That closer to crazy than to worrying