Unfortunately the author and most readers are a bit confused regarding the MKV. It is (or was) not a killer drone, unmanned fighter, or any other precursor to a future military android. Rather, MKV was to be a follow-on effort to the currently deployed missile defense system. Just like the currently deployed interceptors (like Patriot and the Ground-based missiles in Alaska) MKV was designed to be launched aboard a missile booster and maneuver to intercept an enemy incoming warhead. The video shows what looks to be a hovering mechanical drone - but really is a fairly standard test used for propulsion/steering. The "hover test" seen in the video was just to verify that the MKV could indeed operate it's steering motors as it would in outerspace as it flew in a trajectory to intercept an enemy nuclear warhead. It is a neat looking video, but the sounds you hear are simply rocket motors, not any sort of amunition or explosive.