Well, at first look the aircraft appears for be a modified F-18 on a rocket track somewhere in the US. It is interesting to note that rather than solid fuel rockets for propulsion there are non-afterburner (reheats) jet engines for acceleration.
A couple of more things regarding the aircraft is if it is a F-18 the cockpit area looks to wide, as if side by side seating and no horizontal stabilizers/elevators.
It will interesting to find out more.
Perhaps a test bed for some new type of very high speed crew escape system?