For speed, innovation and secrecy, no aircraft of its era came close to the SR-71 Blackbird. See it today at Seattle’s Museum of Flight. — What av geek doesn’t love speed, new technologies, advanced manufacturing methods, and the mysteries of a secret government program? Many aircraft embody these features, but none come close to the Lockheed SR-71 Blackbird. It purposely leaked fuel on the ground, had tires filled with nitrogen, and was made from one…