Back in the summer of '91, I did a weeklong trip to Kirtland and Holloman (sp?). While at Kirtland we got to tour a specially outfitted KC-135 that was an
airborne laser laboratory.

The plane was named Argus. One of the guys there told us that they were flying off the coast of a particular country. They were orbiting back and forth because they carried nuclear/radioactive type of sensors. This country was about to do a test detonation of one of their nuclear bombs or warheads, underground I guess. He said that this country shot a missile at them. Now, I didn't ask specifics, but I am ASSuming that it was a surface to air missile...but who knows... it could have been an air to air missile launched from a fighter jet.
Well, our host went on to say that one of our planes shot the missile down. We were all like

So we asked him which plane it was....and before one of us could let him answer, somebody piped up with, "It must have been an F-15??" He goes, "Nope, not fast enough." Since I knew there had been "fighter" prototypes of the SR-71, I asked "Was it a YF-12 or some other version of the SR-71?" His reply was, "NOPE! Still not fast enough."
We were all like this:

Enough that I still remember it to this day almost 20 years later.
He never did say which plane it was.
