The NRO (national reconnaissance/spysat office), back in 2012. They also gave them the mirror and other components for a third. They were hand-me-downs, presumably obsoleted. Things like that always make me wonder what the current state of the art is, let alone when you look at the things like the SR-71 Blackbird, first launched in 1964 -- 54 years ago!! On the other hand then you look at things like the F-35, SLS, Zumwalt, etc today and it somehow almost seems that we've regressed technologically.