Military (or some other agency) aircraft are designed and built to satisfy a need. The SR-71 fulfilled a need that no longer exists. The U-2 fulfilled a need when it was made and still does although its mission has since changed. Matching or surpassing either's capabilities is not part of the picture now that alternate means, at least for the SR-71, have come into play.
The situation around Groom Lake has changed a lot since the SR-71 was made. When it started flying, no one particularly cared about it. Now people are headed that way because they believe the whole "aliens are based at Area 51" thing and head off to witness for themselves. Considering the usual body count on hand, it's odd that none of them reported this whatzit while someone supposedly 60 miles away did. Very odd indeed.
And this is post 750 so I get another star. How cool is that?
Gotta love conspiracy theories. There are so many to choose from.
Official Channeler of Zechariah Velikovski's Spirit
Do not disturb my circles.