That picture of the BAT brings back memories. As a young Lieutenant of the Air Cavalry I made a trip to Ft. Worth and actually got to touch the mock up. I used to have a picture of me and some of my buddies standing next to it with huge grins on our faces because we had visions of actually flying Army green versions of the thing. We actually got to see the XV-15 flying too. Comanche was still LHX and the sky was the limit. Here I am long retired and tilt-rotors are still struggling to climb out of negativity and Sikorsky's X-2 demonstrator is "new & exciting" technology.