It's the fiftieth anniversary of the first flight of the Blackbird, so here's some pics to celebrate.
61-7959 - Big Tail mod, an attempt to add more electronics and sensors
61-7981 - The Bastard. A replacement for a crashed SR-71B trainer, it was made from a static test front fueslage, and the back half of the crashed YF-12A #06934
61-7980 - Also known as NASA 844, showing shock diamonds
The First Flight - 22 December 1964