Developed for the CIA to replace the U-2 for clandestine overflights of the Soviet Union. The Russian's successful tracking of the U-2 meant that it would be eventually vulnerable to interception. The CIA specified the U-2’s successor had to be capable of flying higher (over 85,000 vs. 70,000 feet), faster (over 2,000 vs. 500 mph), and not be visible on Soviet radar. The aircraft on display is Article 121, the very first A-12 built. First flown by Lou Schalkon 26th April 1962, the aircraft never saw operational service but served as the test prototype for the Blackbird family instead (Total 418.2 flying hours).