Just to add to the Blackbird side of things here, the engineers at Lockheed took an ASG-18 radar by Westinghouse, a GAR-9 missile developed by Hughes, and added their own fire control system. The result: They hit a remote control B-47 at 1,200 feet, while the launching Blackbird was at 75,000 feet and 80 miles away! In 1965!
All in all the system scored a hit on twelve out of thirteen attempts.
All to prove a point. The system was never really ordered, it was just a show of how vulernable the F-111 (then still the TFX) was to a look-down, shoot-down system.
On a slightly different topic, I don't think anyone really knows the top speed of the Blackbird. The faster it went, the more power it generated, because of greater compression, and the more power it generated, in an infinite (almost) loop.