Many, many moons ago when I lived in AZ and was a member of the CAF, we were flying Sentimental Journey to California on the first two weeks of our Summer Tour with the aircraft. We were flying near Palmdale and their ATC called and asked us to make a low pass down the field.
There eight or ten mothballed SR-71s and A-12s parked on the field, all done up in white cocoon material. A weird and sad sight.