You know, after years of believing that this didn't exist, that it was just a codename for cancelled classified UAV known as Tier 3 (that was replaced by Global Hawk), I learned just yesterday it did!
How? I talked with someone who worked on it. He worked at Tonopah in the 80s, worked with the F-117, the B-2, the captured MiGs, and numerous test planes that never saw the light of day. Now, he didn't say the thing ever flew, but he did say they tested the engine for it on the back of an SR-71.
When I mentioned that many promising programs were killed during the 1st Bush and early Clinton administrations for cost reasons and the feeling that "satellites can do it", he said "Yeah, pretty much."
So, I think the bottom line is this plane likely never flew, at least not operationally, but it was in development.
Remember those famous pictures in AvWeek of the "shock diamond" contrails? I bet that was the SR-71 w/Aurora engine on its back testing!