The F-16XL is mostly white and is housed at Edwards (last I knew) and there are detachment people there for testing. Can't think of a good reason that F-16XL would be at Groom.
But people are over-thinking it here. There's not enough information in the photo to determine (other than the aircraft isn't white).
> There's not enough information in the photo to determine
There's enough that I can say it's not an F-16XL. The mystery aircraft is much larger - 20 meters long x 15 meters wingspan, vs the F-16XL at 16m x 10m.
