Indeed, plus one of the aircraft is one of only two remaining examples of the X-21 [0]. I suspect the other is also derelict on the range somewhere. http://en.

Indeed, plus one of the aircraft is one of only two remaining examples of the X-21 [0]. I suspect the other is also derelict on the range somewhere. http://en.wikipedia.org/wiki/Northrop_X-21 http://en.wikipedia.org/wiki/Northrop_X-21